==========================================================================
Ubuntu Security Notice USN-7796-2
October 02, 2025

linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

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-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:
  - Framebuffer layer;
  - BTRFS file system;
  - Ext4 file system;
  - Network file system (NFS) server daemon;
  - Packet sockets;
  - Network traffic control;
  - VMware vSockets driver;
(CVE-2024-49924, CVE-2025-37785, CVE-2025-21796, CVE-2025-38617,
CVE-2025-38618, CVE-2024-35849, CVE-2025-38477)

Update instructions:

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

Ubuntu 18.04 LTS
  linux-image-4.15.0-1140-fips    4.15.0-1140.151
                                  Available with Ubuntu Pro
  linux-image-4.15.0-2086-gcp-fips  4.15.0-2086.92
                                  Available with Ubuntu Pro
  linux-image-4.15.0-2123-aws-fips  4.15.0-2123.129
                                  Available with Ubuntu Pro
  linux-image-aws-fips            4.15.0.2123.117
                                  Available with Ubuntu Pro
  linux-image-aws-fips-4.15       4.15.0.2123.117
                                  Available with Ubuntu Pro
  linux-image-fips                4.15.0.1140.137
                                  Available with Ubuntu Pro
  linux-image-gcp-fips            4.15.0.2086.84
                                  Available with Ubuntu Pro
  linux-image-gcp-fips-4.15       4.15.0.2086.84
                                  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-7796-2
  https://ubuntu.com/security/notices/USN-7796-1
  CVE-2024-35849, CVE-2024-49924, CVE-2025-21796, CVE-2025-37785,
  CVE-2025-38477, CVE-2025-38617, CVE-2025-38618

Package Information: