[USN-7701-2] Linux kernel (FIPS) vulnerabilities

[Giampaolo Fresi Roglia]

==========================================================================
Ubuntu Security Notice USN-7701-2
August 20, 2025

linux-aws-fips, 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-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:
  - Device tree and open firmware driver;
  - SCSI subsystem;
  - TTY drivers;
  - SMB network file system;
  - Bluetooth subsystem;
  - Network traffic control;
(CVE-2023-52757, CVE-2024-49950, CVE-2024-38541, CVE-2023-52975,
CVE-2024-50073, CVE-2025-38083, CVE-2025-37797)

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-fips     5.4.0-1123.133
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1149-aws-fips  5.4.0-1149.159+fips1
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1152-gcp-fips  5.4.0-1152.161+fips1
                                  Available with Ubuntu Pro
  linux-image-aws-fips            5.4.0.1149.96
                                  Available with Ubuntu Pro
  linux-image-aws-fips-5.4        5.4.0.1149.96
                                  Available with Ubuntu Pro
  linux-image-fips                5.4.0.1123.120
                                  Available with Ubuntu Pro
  linux-image-fips-5.4            5.4.0.1123.120
                                  Available with Ubuntu Pro
  linux-image-gcp-fips            5.4.0.1152.94
                                  Available with Ubuntu Pro
  linux-image-gcp-fips-5.4        5.4.0.1152.94
                                  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-7701-2
  https://ubuntu.com/security/notices/USN-7701-1
  CVE-2023-52757, CVE-2023-52975, CVE-2024-38541, CVE-2024-49950,
  CVE-2024-50073, CVE-2025-37797, CVE-2025-38083

Package Information:
  https://launchpad.net/ubuntu/+source/linux-aws-fips/5.4.0-1149.159+fips1
  https://launchpad.net/ubuntu/+source/linux-fips/5.4.0-1123.133
  https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.4.0-1152.161+fips1

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