Ubuntu 22.04 LTS USN-8013-2 Linux Kernel Important Flaws CVE-2025-38561

ubuntu

February 4, 2026

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS

- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS

- linux-fips: Linux kernel 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:

- Cryptographic API;

- SMB network file system;

(CVE-2025-38561, CVE-2025-40019)

Topics Covered

security advisory Ubuntu important system compromise cloud security Linux kernel

Update Instructions

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1099-aws-fips  5.15.0-1099.106+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1099-gcp-fips  5.15.0-1099.108+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1103-azure-fips  5.15.0-1103.112+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-168-fips     5.15.0-168.178+fips1
                                   Available with Ubuntu Pro
   linux-image-aws-fips            5.15.0.1099.95
                                   Available with Ubuntu Pro
   linux-image-aws-fips-5.15       5.15.0.1099.95
                                   Available with Ubuntu Pro
   linux-image-azure-fips          5.15.0.1103.88
                                   Available with Ubuntu Pro
   linux-image-azure-fips-5.15     5.15.0.1103.88
                                   Available with Ubuntu Pro
   linux-image-fips                5.15.0.168.96
                                   Available with Ubuntu Pro
   linux-image-fips-5.15           5.15.0.168.96
                                   Available with Ubuntu Pro
   linux-image-gcp-fips            5.15.0.1099.89
                                   Available with Ubuntu Pro
   linux-image-gcp-fips-5.15       5.15.0.1099.89
                                   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.