[USN-7930-2] Linux kernel (FIPS) vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-7930-2
December 15, 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:
   - Cryptographic API;
   - ACPI drivers;
   - Hardware monitoring drivers;
   - InfiniBand drivers;
   - MTD block device drivers;
   - Network drivers;
   - DesignWare USB3 driver;
   - Ceph distributed file system;
   - Network file system (NFS) server daemon;
   - NILFS2 file system;
   - File systems infrastructure;
   - Tracing infrastructure;
   - Appletalk network protocol;
   - IPv6 networking;
   - Netfilter;
(CVE-2021-47146, CVE-2021-47269, CVE-2021-47385, CVE-2021-47634,
CVE-2022-49026, CVE-2024-49935, CVE-2024-50067, CVE-2024-50095,
CVE-2024-50179, CVE-2024-53112, CVE-2024-53217, CVE-2025-21715,
CVE-2025-21722, CVE-2025-21811, CVE-2025-21855, CVE-2025-38666,
CVE-2025-39964, CVE-2025-40018)

Update instructions:

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

Ubuntu 16.04 LTS
   linux-image-4.4.0-1120-fips     4.4.0-1120.127
                                   Available with Ubuntu Pro
   linux-image-fips                4.4.0.1120.121
                                   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-7930-2
   https://ubuntu.com/security/notices/USN-7930-1
   CVE-2021-47146, CVE-2021-47269, CVE-2021-47385, CVE-2021-47634,
   CVE-2022-49026, CVE-2024-49935, CVE-2024-50067, CVE-2024-50095,
   CVE-2024-50179, CVE-2024-53112, CVE-2024-53217, CVE-2025-21715,
   CVE-2025-21722, CVE-2025-21811, CVE-2025-21855, CVE-2025-38666,
   CVE-2025-39964, CVE-2025-40018

Package Information:
   https://launchpad.net/ubuntu/+source/linux-fips/4.4.0-1120.127

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