[USN-7987-2] Linux kernel (FIPS) vulnerabilities

-----BEGIN PGP SIGNATURE-----

wsB5BAABCAAjFiEEYrygdx1GDec9TV8EZ0GeRcM5nt0FAml77MgFAwAAAAAACgkQZ0GeRcM5nt2X
1wf9GDqEThL6fEvJU++36Kn9xDLasq6gc76uzDHkbsTQhG1rc7Co+no7RGPywkpjRNGY/hiP3di2
3RIMuZiWeV6Q+zm5/sfhToQdTm+lVWqnt/8LaaBxzcREpwEle13uLoNANfLDJdbeMS+h9CiiG4Zy
key/Wf2cdO4rOM+hFxXOlU6VsOmGHM5LzDKSx7Qv+vhsB+Em8LR8oZ8fmCZt9Snc5PrX4UbxviMr
AS9yhOpEnQe2J7nbX9LgxadaSKYOtXRgKkasO/d6rRpWmNJbGNSK8TA2wmMahy4lCmQfMPFkWVey
0eIL53U4+fhV62i3Ya+SqeSjp0YZN18T+9SU8On2uw==
=Yv0I
-----END PGP SIGNATURE-----
==========================================================================
Ubuntu Security Notice USN-7987-2
January 29, 2026

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;
- File systems infrastructure;
- Timer subsystem;
- Packet sockets;
- Network traffic control;
(CVE-2021-47485, CVE-2024-49959, CVE-2024-50195, CVE-2024-53164,
CVE-2024-56606, CVE-2025-39993)

Update instructions:

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

Ubuntu 16.04 LTS
linux-image-4.4.0-1121-fips 4.4.0-1121.128
Available with Ubuntu Pro
linux-image-fips 4.4.0.1121.122
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-7987-2
https://ubuntu.com/security/notices/USN-7987-1
CVE-2021-47485, CVE-2024-49959, CVE-2024-50195, CVE-2024-53164,
CVE-2024-56606, CVE-2025-39993

Package Information:
https://launchpad.net/ubuntu/+source/linux-fips/4.4.0-1121.128