[USN-7755-2] Linux kernel (FIPS) vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7755-2
September 17, 2025

linux-fips, linux-azure-fips, linux-gcp-fips vulnerabilities
==========================================================================

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-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:
- Media drivers;
- SPI subsystem;
- USB core drivers;
- NILFS2 file system;
- IPv6 networking;
- Network traffic control;
(CVE-2024-53130, CVE-2025-38350, CVE-2024-50202, CVE-2024-47685,
CVE-2025-37752, CVE-2024-50051, CVE-2024-57996, CVE-2023-52477,
CVE-2024-27074, CVE-2024-53131)

Update instructions:

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1139-fips 4.15.0-1139.150
Available with Ubuntu Pro
linux-image-4.15.0-2085-gcp-fips 4.15.0-2085.91
Available with Ubuntu Pro
linux-image-4.15.0-2101-azure-fips 4.15.0-2101.107
Available with Ubuntu Pro
linux-image-azure-fips 4.15.0.2101.97
Available with Ubuntu Pro
linux-image-azure-fips-4.15 4.15.0.2101.97
Available with Ubuntu Pro
linux-image-fips 4.15.0.1139.136
Available with Ubuntu Pro
linux-image-gcp-fips 4.15.0.2085.83
Available with Ubuntu Pro
linux-image-gcp-fips-4.15 4.15.0.2085.83
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-7755-2
https://ubuntu.com/security/notices/USN-7755-1
CVE-2023-52477, CVE-2024-27074, CVE-2024-47685, CVE-2024-50051,
CVE-2024-50202, CVE-2024-53130, CVE-2024-53131, CVE-2024-57996,
CVE-2025-37752, CVE-2025-38350

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure-fips/4.15.0-2101.107
https://launchpad.net/ubuntu/+source/linux-fips/4.15.0-1139.150
https://launchpad.net/ubuntu/+source/linux-gcp-fips/4.15.0-2085.91