Home / mailings

PDF

[USN-7795-2] Linux kernel (FIPS) vulnerabilities

Posted on 02 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7795-2
October 02, 2025

linux-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-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:
- Ext4 file system;
- Network file system (NFS) server daemon;
- Packet sockets;
- Network traffic control;
- VMware vSockets driver;
(CVE-2025-38617, CVE-2025-21796, CVE-2025-38618, CVE-2025-38477,
CVE-2025-37785)

Update instructions:

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

Ubuntu 20.04 LTS
linux-image-5.4.0-1125-fips 5.4.0-1125.135
Available with Ubuntu Pro
linux-image-5.4.0-1154-gcp-fips 5.4.0-1154.163+fips1
Available with Ubuntu Pro
linux-image-fips 5.4.0.1125.122
Available with Ubuntu Pro
linux-image-fips-5.4 5.4.0.1125.122
Available with Ubuntu Pro
linux-image-gcp-fips 5.4.0.1154.96
Available with Ubuntu Pro
linux-image-gcp-fips-5.4 5.4.0.1154.96
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-7795-2
https://ubuntu.com/security/notices/USN-7795-1
CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,
CVE-2025-38618

Package Information:
https://launchpad.net/ubuntu/+source/linux-fips/5.4.0-1125.135
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.4.0-1154.163+fips1


--=-=-=Content-Type: application/pgp-signature; name="signature.asc"

 

TOP