Ubuntu alert USN-7795-5 (linux-raspi-5.4)

From:
             
 
Giampaolo Fresi Roglia <giampaolo.fresi.roglia@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-7795-5] Linux kernel (Raspberry Pi) vulnerabilities
Date:
             
 
Fri, 07 Nov 2025 10:39:00 +0100
Message-ID:
             
 
<87jz02w5aj.fsf@canonical.com>
==========================================================================
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



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