[USN-8177-1] Linux kernel vulnerabilities
[USN-8176-1] .NET vulnerabilities
[USN-8180-1] Linux kernel vulnerabilities
[USN-8179-1] Linux kernel vulnerabilities
[USN-8182-1] Rack vulnerabilities
[USN-8181-1] ESAPI vulnerabilities
[USN-8148-7] Linux kernel (NVIDIA) vulnerabilities
[USN-8178-1] oFono vulnerabilities
[USN-8177-1] Linux kernel vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8177-1
April 16, 2026
linux, linux-realtime vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.10
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-realtime: Linux kernel for Real-time systems
Details:
Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo
Rizzo discovered that some AMD Zen processors did not properly verify the
signature of CPU microcode. This flaw is known as EntrySign. A privileged
attacker could possibly use this issue to cause load malicious CPU
microcode causing loss of integrity and confidentiality.
(CVE-2024-36347)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- MIPS architecture;
- PowerPC architecture;
- User-Mode Linux (UML);
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- Ublk userspace block driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- GPU drivers;
- Hardware monitoring drivers;
- Intel Trace Hub HW tracing drivers;
- InfiniBand drivers;
- Input Device core drivers;
- Input Device (Mouse) drivers;
- IOMMU subsystem;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- Mellanox network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- PA-RISC drivers;
- Chrome hardware platform drivers;
- x86 platform drivers;
- SCSI subsystem;
- SPI subsystem;
- TCM subsystem;
- Freescale USB OTG Transceiver Driver;
- USB Type-C Connector System Software Interface driver;
- Watchdog drivers;
- BTRFS file system;
- exFAT file system;
- Ext4 file system;
- F2FS file system;
- FUSE (File system in Userspace);
- HFS+ file system;
- File systems infrastructure;
- Network file system (NFS) server daemon;
- File system notification infrastructure;
- NTFS3 file system;
- OCFS2 file system;
- SMB network file system;
- XFS file system;
- User-space API (UAPI);
- io_uring subsystem;
- Scheduler infrastructure;
- Shadow Call Stack mechanism;
- Tracing infrastructure;
- Memory management;
- BPF subsystem;
- CAIF protocol;
- Ceph Core library;
- Networking core;
- Ethtool driver;
- Handshake API;
- HSR network protocol;
- IPv4 networking;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- NET/ROM layer;
- NFC subsystem;
- Open vSwitch;
- Rose network layer;
- Network traffic control;
- Sun RPC protocol;
- Key management;
- Landlock security;
- STMicroelectronics SoC drivers;
- USB sound devices;
- KVM subsystem;
(CVE-2025-68351, CVE-2025-68353, CVE-2025-68365, CVE-2025-68368,
CVE-2025-68725, CVE-2025-68736, CVE-2025-68745, CVE-2025-68767,
CVE-2025-68768, CVE-2025-68769, CVE-2025-68770, CVE-2025-68771,
CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775,
CVE-2025-68776, CVE-2025-68777, CVE-2025-68778, CVE-2025-68780,
CVE-2025-68781, CVE-2025-68782, CVE-2025-68783, CVE-2025-68784,
CVE-2025-68785, CVE-2025-68786, CVE-2025-68787, CVE-2025-68788,
CVE-2025-68791, CVE-2025-68792, CVE-2025-68793, CVE-2025-68794,
CVE-2025-68795, CVE-2025-68796, CVE-2025-68797, CVE-2025-68798,
CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68802,
CVE-2025-68803, CVE-2025-68804, CVE-2025-68805, CVE-2025-68806,
CVE-2025-68807, CVE-2025-68808, CVE-2025-68809, CVE-2025-68810,
CVE-2025-68811, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815,
CVE-2025-68816, CVE-2025-68817, CVE-2025-68818, CVE-2025-68819,
CVE-2025-68820, CVE-2025-68821, CVE-2025-68822, CVE-2025-68823,
CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067,
CVE-2025-71068, CVE-2025-71069, CVE-2025-71070, CVE-2025-71071,
CVE-2025-71072, CVE-2025-71073, CVE-2025-71075, CVE-2025-71076,
CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71080,
CVE-2025-71081, CVE-2025-71082, CVE-2025-71083, CVE-2025-71084,
CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71089,
CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71095,
CVE-2025-71096, CVE-2025-71097, CVE-2025-71098, CVE-2025-71099,
CVE-2025-71100, CVE-2025-71101, CVE-2025-71102, CVE-2025-71104,
CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109,
CVE-2025-71111, CVE-2025-71112, CVE-2025-71113, CVE-2025-71114,
CVE-2025-71115, CVE-2025-71116, CVE-2025-71117, CVE-2025-71118,
CVE-2025-71119, CVE-2025-71120, CVE-2025-71121, CVE-2025-71122,
CVE-2025-71123, CVE-2025-71124, CVE-2025-71125, CVE-2025-71126,
CVE-2025-71130, CVE-2025-71131, CVE-2025-71132, CVE-2025-71133,
CVE-2025-71135, CVE-2025-71136, CVE-2025-71137, CVE-2025-71138,
CVE-2025-71140, CVE-2025-71143, CVE-2025-71146, CVE-2025-71147,
CVE-2025-71148, CVE-2025-71149, CVE-2025-71150, CVE-2025-71151,
CVE-2025-71153, CVE-2025-71154, CVE-2025-71156, CVE-2025-71157,
CVE-2026-23091, CVE-2026-23209)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.10
linux-image-6.17.0-1010-realtime 6.17.0-1010.11
Available with Ubuntu Pro
linux-image-6.17.0-22-generic 6.17.0-22.22
linux-image-6.17.0-22-generic-64k 6.17.0-22.22
linux-image-generic 6.17.0-22.22
linux-image-generic-6.17 6.17.0-22.22
linux-image-generic-64k 6.17.0-22.22
linux-image-generic-64k-6.17 6.17.0-22.22
linux-image-realtime 6.17.0-1010.11
Available with Ubuntu Pro
linux-image-realtime-6.17 6.17.0-1010.11
Available with Ubuntu Pro
linux-image-virtual 6.17.0-22.22
linux-image-virtual-6.17 6.17.0-22.22
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8177-1
CVE-2024-36347, CVE-2025-68351, CVE-2025-68353, CVE-2025-68365,
CVE-2025-68368, CVE-2025-68725, CVE-2025-68736, CVE-2025-68745,
CVE-2025-68767, CVE-2025-68768, CVE-2025-68769, CVE-2025-68770,
CVE-2025-68771, CVE-2025-68772, CVE-2025-68773, CVE-2025-68774,
CVE-2025-68775, CVE-2025-68776, CVE-2025-68777, CVE-2025-68778,
CVE-2025-68780, CVE-2025-68781, CVE-2025-68782, CVE-2025-68783,
CVE-2025-68784, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787,
CVE-2025-68788, CVE-2025-68791, CVE-2025-68792, CVE-2025-68793,
CVE-2025-68794, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797,
CVE-2025-68798, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801,
CVE-2025-68802, CVE-2025-68803, CVE-2025-68804, CVE-2025-68805,
CVE-2025-68806, CVE-2025-68807, CVE-2025-68808, CVE-2025-68809,
CVE-2025-68810, CVE-2025-68811, CVE-2025-68813, CVE-2025-68814,
CVE-2025-68815, CVE-2025-68816, CVE-2025-68817, CVE-2025-68818,
CVE-2025-68819, CVE-2025-68820, CVE-2025-68821, CVE-2025-68822,
CVE-2025-68823, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066,
CVE-2025-71067, CVE-2025-71068, CVE-2025-71069, CVE-2025-71070,
CVE-2025-71071, CVE-2025-71072, CVE-2025-71073, CVE-2025-71075,
CVE-2025-71076, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079,
CVE-2025-71080, CVE-2025-71081, CVE-2025-71082, CVE-2025-71083,
CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087,
CVE-2025-71089, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094,
CVE-2025-71095, CVE-2025-71096, CVE-2025-71097, CVE-2025-71098,
CVE-2025-71099, CVE-2025-71100, CVE-2025-71101, CVE-2025-71102,
CVE-2025-71104, CVE-2025-71105, CVE-2025-71107, CVE-2025-71108,
CVE-2025-71109, CVE-2025-71111, CVE-2025-71112, CVE-2025-71113,
CVE-2025-71114, CVE-2025-71115, CVE-2025-71116, CVE-2025-71117,
CVE-2025-71118, CVE-2025-71119, CVE-2025-71120, CVE-2025-71121,
CVE-2025-71122, CVE-2025-71123, CVE-2025-71124, CVE-2025-71125,
CVE-2025-71126, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132,
CVE-2025-71133, CVE-2025-71135, CVE-2025-71136, CVE-2025-71137,
CVE-2025-71138, CVE-2025-71140, CVE-2025-71143, CVE-2025-71146,
CVE-2025-71147, CVE-2025-71148, CVE-2025-71149, CVE-2025-71150,
CVE-2025-71151, CVE-2025-71153, CVE-2025-71154, CVE-2025-71156,
CVE-2025-71157, CVE-2026-23091, CVE-2026-23209
Package Information:
https://launchpad.net/ubuntu/+source/linux/6.17.0-22.22
https://launchpad.net/ubuntu/+source/linux-realtime/6.17.0-1010.11
[USN-8176-1] .NET vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8176-1
April 15, 2026
dotnet8, dotnet9, dotnet10 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in .NET.
Software Description:
- dotnet10: .NET CLI tools and runtime
- dotnet8: .NET CLI tools and runtime
- dotnet9: .NET CLI tools and runtime
Details:
Ludvig Pedersen discovered that the System.Security.Cryptography.Xml
library in .NET incorrectly handled certain XML inputs. An attacker could
possibly use this issue to consume excessive resources, resulting in a
denial of service. (CVE-2026-33116, CVE-2026-26171)
Ludvig Pedersen and Kevin Jones discovered that the
System.Security.Cryptography.Xml library in .NET incorrectly handled
certain XML inputs. An attacker could possibly use this issue to cause
.NET to crash, resulting in a denial of service. (CVE-2026-32203)
Ludvig Pedersen discovered that the System.Net.Mail component in .NET
incorrectly handled certain inputs. An attacker could possibly use this
issue to perform a network spoofing attack. (CVE-2026-32178)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.10
aspnetcore-runtime-10.0 10.0.6-0ubuntu1~25.10.1
aspnetcore-runtime-8.0 8.0.26-0ubuntu1~25.10.1
aspnetcore-runtime-9.0 9.0.15-0ubuntu1~25.10.1
dotnet-host-10.0 10.0.6-0ubuntu1~25.10.1
dotnet-host-8.0 8.0.26-0ubuntu1~25.10.1
dotnet-host-9.0 9.0.15-0ubuntu1~25.10.1
dotnet-hostfxr-10.0 10.0.6-0ubuntu1~25.10.1
dotnet-hostfxr-8.0 8.0.26-0ubuntu1~25.10.1
dotnet-hostfxr-9.0 9.0.15-0ubuntu1~25.10.1
dotnet-runtime-10.0 10.0.6-0ubuntu1~25.10.1
dotnet-runtime-8.0 8.0.26-0ubuntu1~25.10.1
dotnet-runtime-9.0 9.0.15-0ubuntu1~25.10.1
dotnet-sdk-10.0 10.0.106-0ubuntu1~25.10.1
dotnet-sdk-8.0 8.0.126-0ubuntu1~25.10.1
dotnet-sdk-9.0 9.0.116-0ubuntu1~25.10.1
dotnet-sdk-aot-10.0 10.0.106-0ubuntu1~25.10.1
dotnet-sdk-aot-9.0 9.0.116-0ubuntu1~25.10.1
dotnet10 10.0.106-10.0.6-0ubuntu1~25.10.1
dotnet8 8.0.126-8.0.26-0ubuntu1~25.10.1
dotnet9 9.0.116-9.0.15-0ubuntu1~25.10.1
Ubuntu 24.04 LTS
aspnetcore-runtime-10.0 10.0.6-0ubuntu1~24.04.1
aspnetcore-runtime-8.0 8.0.26-0ubuntu1~24.04.1
dotnet-host-10.0 10.0.6-0ubuntu1~24.04.1
dotnet-host-8.0 8.0.26-0ubuntu1~24.04.1
dotnet-hostfxr-10.0 10.0.6-0ubuntu1~24.04.1
dotnet-hostfxr-8.0 8.0.26-0ubuntu1~24.04.1
dotnet-runtime-10.0 10.0.6-0ubuntu1~24.04.1
dotnet-runtime-8.0 8.0.26-0ubuntu1~24.04.1
dotnet-sdk-10.0 10.0.106-0ubuntu1~24.04.1
dotnet-sdk-8.0 8.0.126-0ubuntu1~24.04.1
dotnet-sdk-aot-10.0 10.0.106-0ubuntu1~24.04.1
dotnet10 10.0.106-10.0.6-0ubuntu1~24.04.1
dotnet8 8.0.126-8.0.26-0ubuntu1~24.04.1
Ubuntu 22.04 LTS
aspnetcore-runtime-8.0 8.0.26-0ubuntu1~22.04.1
dotnet-host-8.0 8.0.26-0ubuntu1~22.04.1
dotnet-hostfxr-8.0 8.0.26-0ubuntu1~22.04.1
dotnet-runtime-8.0 8.0.26-0ubuntu1~22.04.1
dotnet-sdk-8.0 8.0.126-0ubuntu1~22.04.1
dotnet8 8.0.126-8.0.26-0ubuntu1~22.04.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8176-1
CVE-2026-26171, CVE-2026-32178, CVE-2026-32203, CVE-2026-33116
Package Information:
https://launchpad.net/ubuntu/+source/dotnet10/10.0.106-10.0.6-0ubuntu1~25.10.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.126-8.0.26-0ubuntu1~25.10.1
https://launchpad.net/ubuntu/+source/dotnet9/9.0.116-9.0.15-0ubuntu1~25.10.1
https://launchpad.net/ubuntu/+source/dotnet10/10.0.106-10.0.6-0ubuntu1~24.04.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.126-8.0.26-0ubuntu1~24.04.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.126-8.0.26-0ubuntu1~22.04.1
[USN-8180-1] Linux kernel vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8180-1
April 16, 2026
linux, linux-aws, linux-aws-5.15, linux-gcp, linux-gke, linux-gkeop,
linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle
vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-lowlatency: Linux low latency kernel
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-lowlatency-hwe-5.15: Linux low latency kernel
Details:
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
- BTRFS file system;
- Ext4 file system;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- NFC subsystem;
- BPF subsystem;
- IRQ subsystem;
- Memory management;
- Bluetooth subsystem;
- CAN network layer;
- Networking core;
- IPv4 networking;
- IPv6 networking;
- L2TP protocol;
- NET/ROM layer;
- Network traffic control;
- SCTP protocol;
- TLS protocol;
- XFRM subsystem;
- Creative Sound Blaster X-Fi driver;
- USB sound devices;
(CVE-2023-53421, CVE-2023-53520, CVE-2023-53662, CVE-2023-54207,
CVE-2025-38057, CVE-2025-38125, CVE-2025-38232, CVE-2025-38408,
CVE-2025-38591, CVE-2025-40149, CVE-2025-40164, CVE-2025-68211,
CVE-2025-68340, CVE-2025-68365, CVE-2025-68725, CVE-2025-68817,
CVE-2025-71162, CVE-2025-71163, CVE-2025-71185, CVE-2025-71186,
CVE-2025-71188, CVE-2025-71190, CVE-2025-71191, CVE-2025-71194,
CVE-2025-71196, CVE-2025-71197, CVE-2025-71199, CVE-2026-22997,
CVE-2026-22998, CVE-2026-22999, CVE-2026-23001, CVE-2026-23003,
CVE-2026-23011, CVE-2026-23026, CVE-2026-23033, CVE-2026-23037,
CVE-2026-23038, CVE-2026-23049, CVE-2026-23056, CVE-2026-23058,
CVE-2026-23061, CVE-2026-23063, CVE-2026-23064, CVE-2026-23071,
CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23078,
CVE-2026-23080, CVE-2026-23083, CVE-2026-23084, CVE-2026-23085,
CVE-2026-23087, CVE-2026-23089, CVE-2026-23090, CVE-2026-23091,
CVE-2026-23093, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097,
CVE-2026-23098, CVE-2026-23099, CVE-2026-23101, CVE-2026-23103,
CVE-2026-23105, CVE-2026-23108, CVE-2026-23119, CVE-2026-23120,
CVE-2026-23121, CVE-2026-23124, CVE-2026-23125, CVE-2026-23128,
CVE-2026-23133, CVE-2026-23145, CVE-2026-23146, CVE-2026-23150,
CVE-2026-23164, CVE-2026-23167, CVE-2026-23170, CVE-2026-23209)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1088-gkeop 5.15.0-1088.96
linux-image-5.15.0-1100-nvidia 5.15.0-1100.101
linux-image-5.15.0-1100-nvidia-lowlatency 5.15.0-1100.101
linux-image-5.15.0-1101-gke 5.15.0-1101.107
linux-image-5.15.0-1102-oracle 5.15.0-1102.108
linux-image-5.15.0-1105-aws 5.15.0-1105.112
linux-image-5.15.0-1105-aws-64k 5.15.0-1105.112
linux-image-5.15.0-1105-gcp 5.15.0-1105.114
linux-image-5.15.0-175-lowlatency 5.15.0-175.185
linux-image-5.15.0-175-lowlatency-64k 5.15.0-175.185
linux-image-5.15.0-176-generic 5.15.0-176.186
linux-image-5.15.0-176-generic-64k 5.15.0-176.186
linux-image-5.15.0-176-generic-lpae 5.15.0-176.186
linux-image-aws-5.15 5.15.0.1105.108
linux-image-aws-64k-5.15 5.15.0.1105.108
linux-image-aws-64k-lts-22.04 5.15.0.1105.108
linux-image-aws-lts-22.04 5.15.0.1105.108
linux-image-gcp-5.15 5.15.0.1105.101
linux-image-gcp-lts-22.04 5.15.0.1105.101
linux-image-generic 5.15.0.176.161
linux-image-generic-5.15 5.15.0.176.161
linux-image-generic-64k 5.15.0.176.161
linux-image-generic-64k-5.15 5.15.0.176.161
linux-image-generic-lpae 5.15.0.176.161
linux-image-generic-lpae-5.15 5.15.0.176.161
linux-image-gke 5.15.0.1101.100
linux-image-gke-5.15 5.15.0.1101.100
linux-image-gkeop 5.15.0.1088.87
linux-image-gkeop-5.15 5.15.0.1088.87
linux-image-lowlatency 5.15.0.175.148
linux-image-lowlatency-5.15 5.15.0.175.148
linux-image-lowlatency-64k 5.15.0.175.148
linux-image-lowlatency-64k-5.15 5.15.0.175.148
linux-image-nvidia 5.15.0.1100.100
linux-image-nvidia-5.15 5.15.0.1100.100
linux-image-nvidia-lowlatency 5.15.0.1100.100
linux-image-nvidia-lowlatency-5.15 5.15.0.1100.100
linux-image-oracle-5.15 5.15.0.1102.98
linux-image-oracle-lts-22.04 5.15.0.1102.98
linux-image-virtual 5.15.0.176.161
linux-image-virtual-5.15 5.15.0.176.161
Ubuntu 20.04 LTS
linux-image-5.15.0-1105-aws 5.15.0-1105.112~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-175-lowlatency 5.15.0-175.185~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-175-lowlatency-64k 5.15.0-175.185~20.04.1
Available with Ubuntu Pro
linux-image-aws 5.15.0.1105.112~20.04.1
Available with Ubuntu Pro
linux-image-aws-5.15 5.15.0.1105.112~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.15 5.15.0.175.185~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-5.15 5.15.0.175.185~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-hwe-20.04 5.15.0.175.185~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-20.04 5.15.0.175.185~20.04.1
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8180-1
CVE-2023-53421, CVE-2023-53520, CVE-2023-53662, CVE-2023-54207,
CVE-2025-38057, CVE-2025-38125, CVE-2025-38232, CVE-2025-38408,
CVE-2025-38591, CVE-2025-40149, CVE-2025-40164, CVE-2025-68211,
CVE-2025-68340, CVE-2025-68365, CVE-2025-68725, CVE-2025-68817,
CVE-2025-71162, CVE-2025-71163, CVE-2025-71185, CVE-2025-71186,
CVE-2025-71188, CVE-2025-71190, CVE-2025-71191, CVE-2025-71194,
CVE-2025-71196, CVE-2025-71197, CVE-2025-71199, CVE-2026-22997,
CVE-2026-22998, CVE-2026-22999, CVE-2026-23001, CVE-2026-23003,
CVE-2026-23011, CVE-2026-23026, CVE-2026-23033, CVE-2026-23037,
CVE-2026-23038, CVE-2026-23049, CVE-2026-23056, CVE-2026-23058,
CVE-2026-23061, CVE-2026-23063, CVE-2026-23064, CVE-2026-23071,
CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23078,
CVE-2026-23080, CVE-2026-23083, CVE-2026-23084, CVE-2026-23085,
CVE-2026-23087, CVE-2026-23089, CVE-2026-23090, CVE-2026-23091,
CVE-2026-23093, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097,
CVE-2026-23098, CVE-2026-23099, CVE-2026-23101, CVE-2026-23103,
CVE-2026-23105, CVE-2026-23108, CVE-2026-23119, CVE-2026-23120,
CVE-2026-23121, CVE-2026-23124, CVE-2026-23125, CVE-2026-23128,
CVE-2026-23133, CVE-2026-23145, CVE-2026-23146, CVE-2026-23150,
CVE-2026-23164, CVE-2026-23167, CVE-2026-23170, CVE-2026-23209
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-176.186
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1105.112
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1105.114
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1101.107
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1088.96
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-175.185
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1100.101
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1102.108
[USN-8179-1] Linux kernel vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8179-1
April 16, 2026
linux, linux-aws, linux-aws-6.8, linux-gcp, linux-gke, linux-gkeop,
linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-lowlatency: Linux low latency kernel
- linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems
- linux-lowlatency-hwe-6.8: Linux low latency kernel
Details:
Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo
Rizzo discovered that some AMD Zen processors did not properly verify the
signature of CPU microcode. This flaw is known as EntrySign. A privileged
attacker could possibly use this issue to cause load malicious CPU
microcode causing loss of integrity and confidentiality.
(CVE-2024-36347)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Data acquisition framework and drivers;
- Hardware crypto device drivers;
- GPU drivers;
- Hardware monitoring drivers;
- InfiniBand drivers;
- Input Device core drivers;
- IOMMU subsystem;
- IRQ chip drivers;
- Macintosh device drivers;
- Multiple devices driver;
- Media drivers;
- Network drivers;
- Mellanox network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- MediaTek network drivers;
- NVME drivers;
- PA-RISC drivers;
- Chrome hardware platform drivers;
- x86 platform drivers;
- Voltage and Current Regulator drivers;
- SCSI subsystem;
- SPI subsystem;
- Media Oriented Systems Transport (MOST) driver;
- Realtek RTL8723BS SDIO drivers;
- TCM subsystem;
- USB Host Controller drivers;
- USB Type-C Connector System Software Interface driver;
- Backlight driver;
- Watchdog drivers;
- BFS file system;
- BTRFS file system;
- Ext4 file system;
- F2FS file system;
- FUSE (File system in Userspace);
- HFS+ file system;
- File systems infrastructure;
- Journaling layer for block devices (JBD2);
- Network file system (NFS) client;
- File system notification infrastructure;
- NTFS3 file system;
- OCFS2 file system;
- SMB network file system;
- BPF subsystem;
- Ethernet bridge;
- io_uring subsystem;
- Locking primitives;
- Scheduler infrastructure;
- Shadow Call Stack mechanism;
- Tracing infrastructure;
- Memory management;
- CAIF protocol;
- Ceph Core library;
- Networking core;
- Ethtool driver;
- Handshake API;
- HSR network protocol;
- IPv4 networking;
- IPv6 networking;
- MAC80211 subsystem;
- Multipath TCP;
- Netfilter;
- NET/ROM layer;
- NFC subsystem;
- Open vSwitch;
- Rose network layer;
- Network traffic control;
- Network sockets;
- Sun RPC protocol;
- Integrity Measurement Architecture(IMA) framework;
- Key management;
- Simplified Mandatory Access Control Kernel framework;
- FireWire sound drivers;
- HD-audio driver;
- Turtle Beach Wavefront ALSA driver;
- STMicroelectronics SoC drivers;
- USB sound devices;
- KVM subsystem;
(CVE-2024-57795, CVE-2025-22022, CVE-2025-22111, CVE-2025-38022,
CVE-2025-38234, CVE-2025-40164, CVE-2025-40325, CVE-2025-68206,
CVE-2025-68254, CVE-2025-68255, CVE-2025-68256, CVE-2025-68257,
CVE-2025-68258, CVE-2025-68259, CVE-2025-68261, CVE-2025-68263,
CVE-2025-68264, CVE-2025-68265, CVE-2025-68266, CVE-2025-68291,
CVE-2025-68325, CVE-2025-68332, CVE-2025-68335, CVE-2025-68336,
CVE-2025-68337, CVE-2025-68344, CVE-2025-68345, CVE-2025-68346,
CVE-2025-68347, CVE-2025-68349, CVE-2025-68354, CVE-2025-68362,
CVE-2025-68363, CVE-2025-68364, CVE-2025-68366, CVE-2025-68367,
CVE-2025-68369, CVE-2025-68371, CVE-2025-68372, CVE-2025-68374,
CVE-2025-68378, CVE-2025-68379, CVE-2025-68380, CVE-2025-68724,
CVE-2025-68727, CVE-2025-68728, CVE-2025-68732, CVE-2025-68733,
CVE-2025-68740, CVE-2025-68741, CVE-2025-68742, CVE-2025-68744,
CVE-2025-68746, CVE-2025-68753, CVE-2025-68755, CVE-2025-68756,
CVE-2025-68757, CVE-2025-68758, CVE-2025-68759, CVE-2025-68763,
CVE-2025-68764, CVE-2025-68765, CVE-2025-68766, CVE-2025-68767,
CVE-2025-68769, CVE-2025-68770, CVE-2025-68771, CVE-2025-68772,
CVE-2025-68773, CVE-2025-68774, CVE-2025-68775, CVE-2025-68776,
CVE-2025-68777, CVE-2025-68778, CVE-2025-68780, CVE-2025-68782,
CVE-2025-68783, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787,
CVE-2025-68788, CVE-2025-68794, CVE-2025-68795, CVE-2025-68796,
CVE-2025-68797, CVE-2025-68798, CVE-2025-68799, CVE-2025-68800,
CVE-2025-68801, CVE-2025-68804, CVE-2025-68806, CVE-2025-68808,
CVE-2025-68809, CVE-2025-68810, CVE-2025-68811, CVE-2025-68813,
CVE-2025-68814, CVE-2025-68815, CVE-2025-68816, CVE-2025-68817,
CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-68821,
CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067,
CVE-2025-71068, CVE-2025-71069, CVE-2025-71071, CVE-2025-71072,
CVE-2025-71075, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079,
CVE-2025-71081, CVE-2025-71082, CVE-2025-71083, CVE-2025-71084,
CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71088,
CVE-2025-71089, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094,
CVE-2025-71095, CVE-2025-71096, CVE-2025-71097, CVE-2025-71098,
CVE-2025-71101, CVE-2025-71102, CVE-2025-71104, CVE-2025-71105,
CVE-2025-71107, CVE-2025-71108, CVE-2025-71109, CVE-2025-71111,
CVE-2025-71112, CVE-2025-71113, CVE-2025-71114, CVE-2025-71116,
CVE-2025-71118, CVE-2025-71119, CVE-2025-71120, CVE-2025-71121,
CVE-2025-71122, CVE-2025-71123, CVE-2025-71125, CVE-2025-71126,
CVE-2025-71127, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132,
CVE-2025-71133, CVE-2025-71135, CVE-2025-71136, CVE-2025-71137,
CVE-2025-71138, CVE-2025-71140, CVE-2025-71141, CVE-2025-71143,
CVE-2025-71144, CVE-2025-71147, CVE-2025-71148, CVE-2025-71149,
CVE-2025-71150, CVE-2025-71151, CVE-2025-71153, CVE-2025-71154,
CVE-2026-23209)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
linux-image-6.8.0-1037-gkeop 6.8.0-1037.40
linux-image-6.8.0-1050-gke 6.8.0-1050.56
linux-image-6.8.0-1050-gke-64k 6.8.0-1050.56
linux-image-6.8.0-1051-ibm 6.8.0-1051.51
linux-image-6.8.0-1052-aws 6.8.0-1052.55
linux-image-6.8.0-1052-aws-64k 6.8.0-1052.55
linux-image-6.8.0-1054-gcp 6.8.0-1054.57
linux-image-6.8.0-1054-gcp-64k 6.8.0-1054.57
linux-image-6.8.0-110-generic 6.8.0-110.110
linux-image-6.8.0-110-generic-64k 6.8.0-110.110
linux-image-6.8.0-110-lowlatency 6.8.0-110.110.1
linux-image-6.8.0-110-lowlatency-64k 6.8.0-110.110.1
linux-image-aws-6.8 6.8.0-1052.55
linux-image-aws-64k-6.8 6.8.0-1052.55
linux-image-aws-64k-lts-24.04 6.8.0-1052.55
linux-image-aws-lts-24.04 6.8.0-1052.55
linux-image-gcp-6.8 6.8.0-1054.57
linux-image-gcp-64k-6.8 6.8.0-1054.57
linux-image-gcp-64k-lts-24.04 6.8.0-1054.57
linux-image-gcp-lts-24.04 6.8.0-1054.57
linux-image-generic 6.8.0-110.110
linux-image-generic-6.8 6.8.0-110.110
linux-image-generic-64k 6.8.0-110.110
linux-image-generic-64k-6.8 6.8.0-110.110
linux-image-generic-lpae 6.8.0-110.110
linux-image-gke 6.8.0-1050.56
linux-image-gke-6.8 6.8.0-1050.56
linux-image-gke-64k 6.8.0-1050.56
linux-image-gke-64k-6.8 6.8.0-1050.56
linux-image-gkeop 6.8.0-1037.40
linux-image-gkeop-6.8 6.8.0-1037.40
linux-image-ibm 6.8.0-1051.51
linux-image-ibm-6.8 6.8.0-1051.51
linux-image-ibm-classic 6.8.0-1051.51
linux-image-ibm-lts-24.04 6.8.0-1051.51
linux-image-intel-iotg 6.8.0-110.110
linux-image-kvm 6.8.0-110.110
linux-image-lowlatency 6.8.0-110.110.1
linux-image-lowlatency-6.8 6.8.0-110.110.1
linux-image-lowlatency-64k 6.8.0-110.110.1
linux-image-lowlatency-64k-6.8 6.8.0-110.110.1
linux-image-virtual 6.8.0-110.110
linux-image-virtual-6.8 6.8.0-110.110
Ubuntu 22.04 LTS
linux-image-6.8.0-1052-aws 6.8.0-1052.55~22.04.1
linux-image-6.8.0-1052-aws-64k 6.8.0-1052.55~22.04.1
linux-image-6.8.0-110-lowlatency 6.8.0-110.110.1~22.04.1
linux-image-6.8.0-110-lowlatency-64k 6.8.0-110.110.1~22.04.1
linux-image-aws 6.8.0-1052.55~22.04.1
linux-image-aws-6.8 6.8.0-1052.55~22.04.1
linux-image-aws-64k 6.8.0-1052.55~22.04.1
linux-image-aws-64k-6.8 6.8.0-1052.55~22.04.1
linux-image-lowlatency-6.8 6.8.0-110.110.1~22.04.1
linux-image-lowlatency-64k-6.8 6.8.0-110.110.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 6.8.0-110.110.1~22.04.1
linux-image-lowlatency-hwe-22.04 6.8.0-110.110.1~22.04.1
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8179-1
CVE-2024-36347, CVE-2024-57795, CVE-2025-22022, CVE-2025-22111,
CVE-2025-38022, CVE-2025-38234, CVE-2025-40164, CVE-2025-40325,
CVE-2025-68206, CVE-2025-68254, CVE-2025-68255, CVE-2025-68256,
CVE-2025-68257, CVE-2025-68258, CVE-2025-68259, CVE-2025-68261,
CVE-2025-68263, CVE-2025-68264, CVE-2025-68265, CVE-2025-68266,
CVE-2025-68291, CVE-2025-68325, CVE-2025-68332, CVE-2025-68335,
CVE-2025-68336, CVE-2025-68337, CVE-2025-68344, CVE-2025-68345,
CVE-2025-68346, CVE-2025-68347, CVE-2025-68349, CVE-2025-68354,
CVE-2025-68362, CVE-2025-68363, CVE-2025-68364, CVE-2025-68366,
CVE-2025-68367, CVE-2025-68369, CVE-2025-68371, CVE-2025-68372,
CVE-2025-68374, CVE-2025-68378, CVE-2025-68379, CVE-2025-68380,
CVE-2025-68724, CVE-2025-68727, CVE-2025-68728, CVE-2025-68732,
CVE-2025-68733, CVE-2025-68740, CVE-2025-68741, CVE-2025-68742,
CVE-2025-68744, CVE-2025-68746, CVE-2025-68753, CVE-2025-68755,
CVE-2025-68756, CVE-2025-68757, CVE-2025-68758, CVE-2025-68759,
CVE-2025-68763, CVE-2025-68764, CVE-2025-68765, CVE-2025-68766,
CVE-2025-68767, CVE-2025-68769, CVE-2025-68770, CVE-2025-68771,
CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775,
CVE-2025-68776, CVE-2025-68777, CVE-2025-68778, CVE-2025-68780,
CVE-2025-68782, CVE-2025-68783, CVE-2025-68785, CVE-2025-68786,
CVE-2025-68787, CVE-2025-68788, CVE-2025-68794, CVE-2025-68795,
CVE-2025-68796, CVE-2025-68797, CVE-2025-68798, CVE-2025-68799,
CVE-2025-68800, CVE-2025-68801, CVE-2025-68804, CVE-2025-68806,
CVE-2025-68808, CVE-2025-68809, CVE-2025-68810, CVE-2025-68811,
CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816,
CVE-2025-68817, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820,
CVE-2025-68821, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066,
CVE-2025-71067, CVE-2025-71068, CVE-2025-71069, CVE-2025-71071,
CVE-2025-71072, CVE-2025-71075, CVE-2025-71077, CVE-2025-71078,
CVE-2025-71079, CVE-2025-71081, CVE-2025-71082, CVE-2025-71083,
CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087,
CVE-2025-71088, CVE-2025-71089, CVE-2025-71091, CVE-2025-71093,
CVE-2025-71094, CVE-2025-71095, CVE-2025-71096, CVE-2025-71097,
CVE-2025-71098, CVE-2025-71101, CVE-2025-71102, CVE-2025-71104,
CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109,
CVE-2025-71111, CVE-2025-71112, CVE-2025-71113, CVE-2025-71114,
CVE-2025-71116, CVE-2025-71118, CVE-2025-71119, CVE-2025-71120,
CVE-2025-71121, CVE-2025-71122, CVE-2025-71123, CVE-2025-71125,
CVE-2025-71126, CVE-2025-71127, CVE-2025-71130, CVE-2025-71131,
CVE-2025-71132, CVE-2025-71133, CVE-2025-71135, CVE-2025-71136,
CVE-2025-71137, CVE-2025-71138, CVE-2025-71140, CVE-2025-71141,
CVE-2025-71143, CVE-2025-71144, CVE-2025-71147, CVE-2025-71148,
CVE-2025-71149, CVE-2025-71150, CVE-2025-71151, CVE-2025-71153,
CVE-2025-71154, CVE-2026-23209
Package Information:
https://launchpad.net/ubuntu/+source/linux/6.8.0-110.110
https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1052.55
https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1054.57
https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1050.56
https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1037.40
https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1051.51
https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-110.110.1
https://launchpad.net/ubuntu/+source/linux-aws-6.8/6.8.0-1052.55~22.04.1
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-110.110.1~22.04.1
[USN-8182-1] Rack vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8182-1
April 17, 2026
ruby-rack vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Rack.
Software Description:
- ruby-rack: modular Ruby webserver interface
Details:
Andrew Lacambra discovered that Rack did not properly parse certain regular
expressions. An attacker could possibly use this issue to bypass network
security filters. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04
LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-26961)
William T. Nelson discovered that Rack did not handle multipart headers
correctly. An attacker could possibly use this issue to cause downstream
parsing issues or a denial of service. This issue only affected Ubuntu
25.10. (CVE-2026-26962)
It was discovered that Rack did not handle the Forwarded header correctly.
An attacker could possibly use this issue to manipulate header values. This
issue only affected Ubuntu 25.10. (CVE-2026-32762)
It was discovered that Rack could consume excessive CPU when handling
certain Accept-Encoding values. An attacker could possibly use this issue
to cause a denial of service. (CVE-2026-34230)
Haruki Oyama discovered that certain configurations of Rack could
erroneously fail to derive the displayed directory path, and expose the
full filesystem path. An attacker could possibly use this issue to disclose
deployment details such as layout and usernames. (CVE-2026-34763)
It was discovered that Rack did not properly handle static file paths. An
attacker could possibly use this issue to exfiltrate unintentionally served
data. (CVE-2026-34785)
Haruki Oyama discovered that Rack did not apply header rules to certain
requests for URL-encoded static paths. An attacker could possibly use this
issue to bypass security-relevant response headers. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 25.10. (CVE-2026-34786)
It was discovered that Rack did not limit the number of ranges requested in
the Range header. An attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04
LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu
25.10. (CVE-2026-34826)
It was discovered that Rack could consume excessive CPU when parsing
certain multipart parameters. An attacker could possibly use this to cause
a denial of service. This issue only affected Ubuntu 25.10.
(CVE-2026-34827)
It was discovered that Rack could consume unbounded disk space when
handling requests without a Content-Length header. An attacker could
possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu
25.10. (CVE-2026-34829)
Mehtab Zafar discovered that Rack directly interpreted the X-Accel-Mapping
header as a regular expression without escaping. An attacker could possibly
use this issue to exfiltrate arbitrary files from internal locations. This
issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-34830)
It was discovered that Rack did not properly handle messages with Unicode.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu
25.10. (CVE-2026-34831)
It was discovered that Rack did not properly parse the Host header. An
attacker could possibly use this issue to bypass security filters or poison
generated links. This issue only affected Ubuntu 25.10. (CVE-2026-34835)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.10
ruby-rack 3.1.16-0.1ubuntu0.3
Ubuntu 24.04 LTS
ruby-rack 2.2.7-1ubuntu0.7
Ubuntu 22.04 LTS
ruby-rack 2.1.4-5ubuntu1.2+esm3
Available with Ubuntu Pro
Ubuntu 20.04 LTS
ruby-rack 2.0.7-2ubuntu0.1+esm10
Available with Ubuntu Pro
Ubuntu 18.04 LTS
ruby-rack 1.6.4-4ubuntu0.2+esm10
Available with Ubuntu Pro
Ubuntu 16.04 LTS
ruby-rack 1.6.4-3ubuntu0.2+esm10
Available with Ubuntu Pro
Ubuntu 14.04 LTS
librack-ruby 1.5.2-3+deb8u3ubuntu1~esm11
Available with Ubuntu Pro
librack-ruby1.8 1.5.2-3+deb8u3ubuntu1~esm11
Available with Ubuntu Pro
librack-ruby1.9.1 1.5.2-3+deb8u3ubuntu1~esm11
Available with Ubuntu Pro
ruby-rack 1.5.2-3+deb8u3ubuntu1~esm11
Available with Ubuntu Pro
After a standard system update you need to restart any applications using
Rack to make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8182-1
CVE-2026-26961, CVE-2026-26962, CVE-2026-32762, CVE-2026-34230,
CVE-2026-34763, CVE-2026-34785, CVE-2026-34786, CVE-2026-34826,
CVE-2026-34827, CVE-2026-34829, CVE-2026-34830, CVE-2026-34831,
CVE-2026-34835
Package Information:
https://launchpad.net/ubuntu/+source/ruby-rack/3.1.16-0.1ubuntu0.3
https://launchpad.net/ubuntu/+source/ruby-rack/2.2.7-1ubuntu0.7
[USN-8181-1] ESAPI vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8181-1
April 16, 2026
libowasp-esapi-java vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in ESAPI.
Software Description:
- libowasp-esapi-java: Web application security control library from OWASP
Details:
Jaroslav Lobačevski discovered that ESAPI incorrectly validated directory
paths during path verification. An attacker could possibly use this issue
to bypass directory validation checks, leading to control-flow bypass. This
issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS,
and Ubuntu 22.04 LTS. (CVE-2022-23457)
Kevin W. Wall and Sebastian Passaro discovered that ESAPI did not properly
sanitize javascript URLs because of an incorrect regular expression. An
attacker could possibly use this issue to perform a cross-site scripting
attack. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu
20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-24891)
Longlong Gong discovered that ESAPI did not properly neutralize special
elements during SQL injection defense. A remote attacker could possibly use
this issue to perform SQL injection. (CVE-2025-5878)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
libowasp-esapi-java 2.4.0.0-2ubuntu0.1
Ubuntu 22.04 LTS
libowasp-esapi-java 2.2.3.1-1ubuntu0.1~esm1
Available with Ubuntu Pro
libowasp-esapi-java-doc 2.2.3.1-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 20.04 LTS
libowasp-esapi-java 2.1.0-3ubuntu0.20.04.1~esm1
Available with Ubuntu Pro
libowasp-esapi-java-doc 2.1.0-3ubuntu0.20.04.1~esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libowasp-esapi-java 2.1.0-3ubuntu0.18.04.1~esm1
Available with Ubuntu Pro
libowasp-esapi-java-doc 2.1.0-3ubuntu0.18.04.1~esm1
Available with Ubuntu Pro
Ubuntu 16.04 LTS
libowasp-esapi-java 2.1.0-2ubuntu0.1~esm1
Available with Ubuntu Pro
libowasp-esapi-java-doc 2.1.0-2ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8181-1
CVE-2022-23457, CVE-2022-24891, CVE-2025-5878
Package Information:
https://launchpad.net/ubuntu/+source/libowasp-esapi-java/2.4.0.0-2ubuntu0.1
[USN-8148-7] Linux kernel (NVIDIA) vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8148-7
April 16, 2026
linux-nvidia-lowlatency, linux-nvidia-tegra vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-nvidia-lowlatency: Linux low latency kernel for NVIDIA systems
- linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems
Details:
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Cryptographic API;
- Netfilter;
- Network traffic control;
(CVE-2026-23060, CVE-2026-23074, CVE-2026-23111)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
linux-image-6.8.0-1021-nvidia-tegra 6.8.0-1021.21
linux-image-6.8.0-1021-nvidia-tegra-rt 6.8.0-1021.21
linux-image-6.8.0-1050-nvidia-lowlatency 6.8.0-1050.53.1
linux-image-6.8.0-1050-nvidia-lowlatency-64k 6.8.0-1050.53.1
linux-image-nvidia-lowlatency 6.8.0-1050.53.1
linux-image-nvidia-lowlatency-6.8 6.8.0-1050.53.1
linux-image-nvidia-lowlatency-64k 6.8.0-1050.53.1
linux-image-nvidia-lowlatency-64k-6.8 6.8.0-1050.53.1
linux-image-nvidia-tegra 6.8.0-1021.21
linux-image-nvidia-tegra-6.8 6.8.0-1021.21
linux-image-nvidia-tegra-rt 6.8.0-1021.21
linux-image-nvidia-tegra-rt-6.8 6.8.0-1021.21
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8148-7
https://ubuntu.com/security/notices/USN-8148-6
https://ubuntu.com/security/notices/USN-8148-5
https://ubuntu.com/security/notices/USN-8148-4
https://ubuntu.com/security/notices/USN-8148-3
https://ubuntu.com/security/notices/USN-8148-2
https://ubuntu.com/security/notices/USN-8148-1
CVE-2026-23060, CVE-2026-23074, CVE-2026-23111
Package Information:
https://launchpad.net/ubuntu/+source/linux-nvidia-lowlatency/6.8.0-1050.53.1
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/6.8.0-1021.21
[USN-8178-1] oFono vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8178-1
April 16, 2026
ofono vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
oFono could be made to crash if it received specially crafted input.
Software Description:
- ofono: A free software project for mobile telephony applications
Details:
It was discovered that oFono incorrectly handled crafted responses
from AT commands. An attacker could possibly use this issue to crash
the program, resulting in a denial of service or arbitrary code
execution. (CVE-2024-7538, CVE-2024-7539, CVE-2024-7540, CVE-2024-7541,
CVE-2024-7542)
Lucas Leong discovered that oFono incorrectly handled crafted input.
An attacker could possibly use this issue to crash the program,
resulting in a denial of service or arbitrary code execution.
(CVE-2024-7543, CVE-2024-7544, CVE-2024-7545, CVE-2024-7546,
CVE-2024-7547)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
ofono 1.31-3ubuntu3.24.04.2+esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
ofono 1.31-3ubuntu1.2+esm1
Available with Ubuntu Pro
Ubuntu 20.04 LTS
ofono 1.31-2ubuntu1+esm3
Available with Ubuntu Pro
Ubuntu 18.04 LTS
ofono 1.21-1ubuntu1+esm3
Available with Ubuntu Pro
Ubuntu 16.04 LTS
ofono 1.17.bzr6912+16.04.20160314.3-0ubuntu1+esm3
Available with Ubuntu Pro
References:
https://ubuntu.com/security/notices/USN-8178-1
CVE-2024-7538, CVE-2024-7539, CVE-2024-7540, CVE-2024-7541,
CVE-2024-7542, CVE-2024-7543, CVE-2024-7544, CVE-2024-7545,
CVE-2024-7546, CVE-2024-7547
