[USN-7727-2] Linux kernel (FIPS) vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-7727-2
August 28, 2025

linux-fips vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-fips: Linux kernel 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:
   - InfiniBand drivers;
   - Media drivers;
   - SPI subsystem;
   - USB core drivers;
   - NILFS2 file system;
   - IPv6 networking;
   - Network traffic control;
(CVE-2024-50051, CVE-2025-37752, CVE-2024-53130, CVE-2024-47685,
CVE-2024-27074, CVE-2023-52477, CVE-2024-50202, CVE-2021-47345,
CVE-2024-57996, CVE-2024-53131)

Update instructions:

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

Ubuntu 16.04 LTS
   linux-image-4.4.0-1117-fips     4.4.0-1117.124
                                   Available with Ubuntu Pro
   linux-image-fips                4.4.0.1117.118
                                   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-7727-2
   https://ubuntu.com/security/notices/USN-7727-1
   CVE-2021-47345, 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

Package Information:
   https://launchpad.net/ubuntu/+source/linux-fips/4.4.0-1117.124

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