[USN-7928-4] Linux kernel (Raspberry Pi) vulnerabilities

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

wsB5BAABCAAjFiEEYrygdx1GDec9TV8EZ0GeRcM5nt0FAmlFZgUFAwAAAAAACgkQZ0GeRcM5nt34
nAf/fH2Tw/35NHqtSuTwphaHmXr0atXgTaEj/1RvP9puG2f+k7Pwwfcdsq8JjKCkXaF5KoWFzqaR
tlrRV4COOvbCe5fb1NFgLzJku0fZXurwO8KLLHLRYu+mGOG0/hr/M7irvpSZtu4gZbILH0S28yLo
Zp2B0Oxax/MU71nbPUhyS55witaKAuhIl1OFeWhXhyEIne4uGxykMvWQeISsIblYqGWFQ7YMTmb1
wp++y3IEu9KlLLBa3/hFyZKtauq7I3aBvazwy4d8fpGP9tI+DUpIO60BOy/9GSYdcNd4lk+CQwmS
8JknDSIKXMhvYqtQCZFDQH+QZcwKPZVSLHnEy6lNbw==
=xitJ
-----END PGP SIGNATURE-----
==========================================================================
Ubuntu Security Notice USN-7928-4
December 19, 2025

linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-raspi: Linux kernel for Raspberry Pi systems

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;
- Media drivers;
- Network drivers;
- AFS file system;
- F2FS file system;
- Tracing infrastructure;
- Netfilter;
(CVE-2022-49390, CVE-2024-47691, CVE-2024-50067, CVE-2024-53090,
CVE-2024-53218, CVE-2025-21855, CVE-2025-39964, CVE-2025-39993,
CVE-2025-40018)

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-5.15.0-1092-raspi 5.15.0-1092.95
linux-image-raspi 5.15.0.1092.90
linux-image-raspi-5.15 5.15.0.1092.90
linux-image-raspi-nolpae 5.15.0.1092.90

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-7928-4
https://ubuntu.com/security/notices/USN-7928-3
https://ubuntu.com/security/notices/USN-7928-2
https://ubuntu.com/security/notices/USN-7928-1
CVE-2022-49390, CVE-2024-47691, CVE-2024-50067, CVE-2024-53090,
CVE-2024-53218, CVE-2025-21855, CVE-2025-39964, CVE-2025-39993,
CVE-2025-40018

Package Information:
https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1092.95