A security notice was issued for Ubuntu 24.04 LTS due to vulnerabilities in the Linux kernel. These issues, which affect the cryptographic API, SMB network file system, and io_uring subsystem, could potentially be exploited by an attacker to compromise a system. To fix these problems, users need to update their systems to specific package versions, including linux-image-6.8.0-1022-xilinx and linux-image-6.8.0-94-lowlatency. After updating, it's essential to reboot the computer and possibly reinstall third-party kernel modules due to an ABI change.

[USN-8015-5] Linux kernel vulnerabilities

[USN-8015-5] Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-8015-5
February 20, 2026

linux-lowlatency, linux-xilinx 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-lowlatency: Linux low latency kernel
- linux-xilinx: Linux kernel for Xilinx 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;
- SMB network file system;
- io_uring subsystem;
(CVE-2025-38561, CVE-2025-39698, CVE-2025-40019)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
linux-image-6.8.0-1022-xilinx 6.8.0-1022.23
linux-image-6.8.0-94-lowlatency 6.8.0-94.96.1
linux-image-6.8.0-94-lowlatency-64k 6.8.0-94.96.1
linux-image-lowlatency 6.8.0-94.96.1
linux-image-lowlatency-6.8 6.8.0-94.96.1
linux-image-lowlatency-64k 6.8.0-94.96.1
linux-image-lowlatency-64k-6.8 6.8.0-94.96.1
linux-image-xilinx 6.8.0.1022.23
linux-image-xilinx-6.8 6.8.0.1022.23
linux-image-xilinx-zynqmp 6.8.0.1022.23

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-8015-5
https://ubuntu.com/security/notices/USN-8015-4
https://ubuntu.com/security/notices/USN-8015-3
https://ubuntu.com/security/notices/USN-8015-2
https://ubuntu.com/security/notices/USN-8015-1
CVE-2025-38561, CVE-2025-39698, CVE-2025-40019

Package Information:
https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-94.96.1
https://launchpad.net/ubuntu/+source/linux-xilinx/6.8.0-1022.23