Ubuntu alert USN-8850-1 (linux-bluefield)

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noreply+usn-bot--- via ubuntu-security-announce <ubuntu-security-announce@lists.ubuntu.com>
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ubuntu-security-announce@lists.ubuntu.com
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[USN-8850-1] Linux kernel (BlueField) vulnerabilities
Date:
             
 
Wed, 30 Sep 2026 10:12:27 +0000
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<E1xBrIZ-0005yx-4X@lists.ubuntu.com>
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noreply+usn-bot@canonical.com
==========================================================================
Ubuntu Security Notice USN-8850-1
September 30, 2026

linux-bluefield vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms

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:
  - Network file system (NFS) server daemon;
  - OCFS2 file system;
  - IPv6 networking;
  - Netfilter;
  - SCTP protocol;
(CVE-2025-38724, CVE-2026-53043, CVE-2026-53131, CVE-2026-53221,
CVE-2026-53224, CVE-2026-53225, CVE-2026-53246, CVE-2026-53309)

Update instructions:

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

Ubuntu 20.04 LTS
  linux-image-5.4.0-1123-bluefield  5.4.0-1123.130
                                  Available with Ubuntu Pro
  linux-image-bluefield           5.4.0.1123.119
                                  Available with Ubuntu Pro
  linux-image-bluefield-5.4       5.4.0.1123.119
                                  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-8850-1
  CVE-2025-38724, CVE-2026-53043, CVE-2026-53131, CVE-2026-53221,
  CVE-2026-53224, CVE-2026-53225, CVE-2026-53246, CVE-2026-53309


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