[USN-7795-5] Linux kernel (Raspberry Pi) vulnerabilities

[Giampaolo Fresi Roglia]

==========================================================================
Ubuntu Security Notice USN-7795-5
November 07, 2025

linux-raspi-5.4 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-raspi-5.4: 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:
  - Ext4 file system;
  - Network file system (NFS) server daemon;
  - Packet sockets;
  - Network traffic control;
  - VMware vSockets driver;
(CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,
CVE-2025-38618)

Update instructions:

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

Ubuntu 18.04 LTS
  linux-image-5.4.0-1134-raspi    5.4.0-1134.147~18.04.1
                                  Available with Ubuntu Pro
  linux-image-raspi-5.4           5.4.0.1134.147~18.04.1
                                  Available with Ubuntu Pro
  linux-image-raspi-hwe-18.04     5.4.0.1134.147~18.04.1
                                  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-7795-5
  https://ubuntu.com/security/notices/USN-7795-4
  https://ubuntu.com/security/notices/USN-7795-3
  https://ubuntu.com/security/notices/USN-7795-2
  https://ubuntu.com/security/notices/USN-7795-1
  CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,
  CVE-2025-38618

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 710 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20251107/05f0a004/attachment.sig>