[USN-7408-3] Linux kernel (FIPS) vulnerabilities

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Ubuntu Security Notice USN-7408-3
April 07, 2025

linux-azure-fips, linux-gcp-fips 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-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with
FIPS

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:
- SMB network file system;
- Network namespace;
- Networking core;
(CVE-2024-56658, CVE-2024-35864, CVE-2024-26928)

Update instructions:

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

Ubuntu 20.04 LTS
linux-image-5.4.0-1146-gcp-fips 5.4.0-1146.155+fips1
Available with Ubuntu Pro
linux-image-5.4.0-1148-azure-fips 5.4.0-1148.156+fips1
Available with Ubuntu Pro
linux-image-azure-fips 5.4.0.1148.86
Available with Ubuntu Pro
linux-image-gcp-fips 5.4.0.1146.88
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-7408-3
https://ubuntu.com/security/notices/USN-7408-2
https://ubuntu.com/security/notices/USN-7408-1
CVE-2024-26928, CVE-2024-35864, CVE-2024-56658