Several security updates have been released for various packages, including the kernel, .NET framework, and Python. These updates address multiple vulnerabilities, including use-after-free errors, denial of service attacks, and information disclosure issues. The most severe vulnerability is in the .NET framework, where a Denial of Service (DoS) attack can occur via an out-of-bounds read error. This issue affects multiple versions of .NET, including 8.0, 9.0, and 10.0. Other notable vulnerabilities include a use-after-free error in the kernel's device mapper, which can be exploited to gain elevated privileges; information disclosure issues in Python, specifically in its IMAP and POP3 libraries; and buffer overflows in the libpng library used by Mingw.

ALSA-2026:4012: kernel security update (Moderate)
ALSA-2026:4450: .NET 9.0 security update (Important)
ALSA-2026:4453: .NET 10.0 security update (Important)
ALSA-2026:4451: .NET 8.0 security update (Important)
ALSA-2026:3940: nfs-utils security update (Moderate)
ALSA-2026:3842: delve security update (Moderate)
ALSA-2026:4168: python3.9 security update (Moderate)
ALSA-2026:4177: opentelemetry-collector security update (Important)
ALSA-2026:4188: gnutls security update (Moderate)
ALSA-2026:4216: python3.11 security update (Moderate)
ALSA-2026:4454: .NET 8.0 security update (Important)
ALSA-2026:3985: git-lfs security update (Important)
ALSA-2026:4306: mingw-libpng security update (Important)
ALSA-2026:4458: .NET 10.0 security update (Important)
ALSA-2026:4455: .NET 8.0 security update (Important)
ALSA-2026:4463: python3.12 security update (Moderate)
ALSA-2026:4442: vim security update (Moderate)
ALSA-2026:4443: .NET 9.0 security update (Important)

ALSA-2026:4012: kernel security update (Moderate)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: Linux kernel: Use-after-free in device mapper due to race condition in zone reporting (CVE-2025-38141)
* kernel: Linux kernel io_uring: Local privilege escalation, information disclosure, or denial of service via use-after-free (CVE-2025-38106)
* kernel: drm/xe: Make dma-fences compliant with the safe access rules (CVE-2025-38703)
* kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing (CVE-2025-39760)
* kernel: HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save (CVE-2025-39818)
* kernel: Kernel: Use-after-free in GPIO character device allows privilege escalation or denial of service (CVE-2025-40249)
* kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085)
* kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)
* kernel: Linux kernel: Denial of Service due to a deadlock in hugetlb folio migration (CVE-2026-23097)
* kernel: Linux kernel: Information disclosure in efivarfs via incorrect error propagation (CVE-2026-23156)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-4012.html

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ALSA-2026:4450: .NET 9.0 security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.115 and .NET Runtime 9.0.14.Security Fix(es):

* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-4450.html

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AlmaLinux Team

ALSA-2026:4453: .NET 10.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 10.0.104 and .NET Runtime 10.0.4.Security Fix(es):

* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-4453.html

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ALSA-2026:4451: .NET 8.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.125 and .NET Runtime 8.0.25.Security Fix(es):

* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-4451.html

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ALSA-2026:3940: nfs-utils security update (Moderate)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

The nfs-utils packages provide a daemon for the kernel Network File System (NFS) server and related tools, which provides better performance than the traditional Linux NFS server used by most users. These packages also contain the mount.nfs, umount.nfs, and showmount programs.

Security Fix(es):

* nfs-utils: rpc.mountd in the nfs-utils privilege escalation (CVE-2025-12801)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-3940.html

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ALSA-2026:3842: delve security update (Moderate)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you're using a debugger, things aren't going your way. With that in mind, Delve should stay out of your way as much as possible.

Security Fix(es):

* crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-3842.html

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AlmaLinux Team

ALSA-2026:4168: python3.9 security update (Moderate)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

* cpython: IMAP command injection in user-controlled commands (CVE-2025-15366)
* cpython: POP3 command injection in user-controlled commands (CVE-2025-15367)
* cpython: email header injection due to unquoted newlines (CVE-2026-1299)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-4168.html

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AlmaLinux Team

ALSA-2026:4177: opentelemetry-collector security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

Collector with the supported components for a AlmaLinux build of OpenTelemetry

Security Fix(es):

* golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)
* crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-4177.html

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AlmaLinux Team

ALSA-2026:4188: gnutls security update (Moderate)

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AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

Security Fix(es):

* gnutls: Stack-based Buffer Overflow in gnutls_pkcs11_token_init() Function (CVE-2025-9820)
* gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification (CVE-2025-14831)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-4188.html

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AlmaLinux Team

ALSA-2026:4216: python3.11 security update (Moderate)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

* cpython: IMAP command injection in user-controlled commands (CVE-2025-15366)
* cpython: POP3 command injection in user-controlled commands (CVE-2025-15367)
* cpython: email header injection due to unquoted newlines (CVE-2026-1299)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-4216.html

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AlmaLinux Team

ALSA-2026:4454: .NET 8.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.125 and .NET Runtime 8.0.25.Security Fix(es):

* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-4454.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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AlmaLinux Team

ALSA-2026:3985: git-lfs security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

Git Large File Storage (LFS) replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git, while storing the file contents on a remote server.

Security Fix(es):

* golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)
* crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-3985.html

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AlmaLinux Team

ALSA-2026:4306: mingw-libpng security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

MinGW Windows Libpng library.

Security Fix(es):

* libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API (CVE-2026-22801)
* libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read (CVE-2026-22695)
* libpng: LIBPNG has a heap buffer overflow in png_set_quantize (CVE-2026-25646)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4306.html

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AlmaLinux Team

ALSA-2026:4458: .NET 10.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 10.0.104 and .NET Runtime 10.0.4.Security Fix(es):

* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4458.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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AlmaLinux Team

ALSA-2026:4455: .NET 8.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.125 and .NET Runtime 8.0.25.Security Fix(es):

* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4455.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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AlmaLinux Team

ALSA-2026:4463: python3.12 security update (Moderate)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Moderate
Release date: 2026-03-13

Summary:

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

* cpython: wsgiref.headers.Headers allows header newline injection in Python (CVE-2026-0865)
* cpython: IMAP command injection in user-controlled commands (CVE-2025-15366)
* cpython: POP3 command injection in user-controlled commands (CVE-2025-15367)
* cpython: email header injection due to unquoted newlines (CVE-2026-1299)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4463.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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AlmaLinux Team

ALSA-2026:4442: vim security update (Moderate)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Moderate
Release date: 2026-03-12

Summary:

Vim (Vi IMproved) is an updated and improved version of the vi editor.

Security Fix(es):

* vim: Vim: Arbitrary code execution via 'helpfile' option processing (CVE-2026-25749)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4442.html

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AlmaLinux Team

ALSA-2026:4443: .NET 9.0 security update (Important)

Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-03-13

Summary:

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.115 and .NET Runtime 9.0.14.Security Fix(es):

* .net: .NET: Denial of Service via out-of-bounds read (CVE-2026-26127)
* asp.net: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-26130)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-4443.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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AlmaLinux Team