[USN-7704-5] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-7704-5
August 28, 2025

linux-gke, linux-kvm 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-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-kvm: Linux kernel for cloud environments

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;
   - Arm Firmware Framework for ARMv8-A(FFA);
   - Multiple devices driver;
   - Media drivers;
   - Network drivers;
   - NVDIMM (Non-Volatile Memory Device) drivers;
   - NVME drivers;
   - x86 platform drivers;
   - TCM subsystem;
   - Virtio drivers;
   - File systems infrastructure;
   - SMB network file system;
   - LZO compression library;
   - Digital Audio (PCM) driver;
   - Tracing infrastructure;
   - Padata parallel execution mechanism;
   - CAN network layer;
   - Networking core;
   - TIPC protocol;
   - ALSA framework;
(CVE-2025-38079, CVE-2025-38048, CVE-2025-38075, CVE-2025-38077,
CVE-2025-38035, CVE-2025-38037, CVE-2025-38034, CVE-2025-38058,
CVE-2025-38004, CVE-2025-38031, CVE-2025-38078, CVE-2025-38044,
CVE-2025-38066, CVE-2025-38052, CVE-2025-38043, CVE-2025-38065,
CVE-2025-38003, CVE-2025-38061, CVE-2025-38051, CVE-2025-38072,
CVE-2025-38068)

Update instructions:

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1086-kvm     5.15.0-1086.91
   linux-image-5.15.0-1087-gke     5.15.0-1087.93
   linux-image-gke                 5.15.0.1087.86
   linux-image-gke-5.15            5.15.0.1087.86
   linux-image-kvm                 5.15.0.1086.82
   linux-image-kvm-5.15            5.15.0.1086.82

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-7704-5
   https://ubuntu.com/security/notices/USN-7704-4
   https://ubuntu.com/security/notices/USN-7704-3
   https://ubuntu.com/security/notices/USN-7704-2
   https://ubuntu.com/security/notices/USN-7704-1
   CVE-2025-38003, CVE-2025-38004, CVE-2025-38031, CVE-2025-38034,
   CVE-2025-38035, CVE-2025-38037, CVE-2025-38043, CVE-2025-38044,
   CVE-2025-38048, CVE-2025-38051, CVE-2025-38052, CVE-2025-38058,
   CVE-2025-38061, CVE-2025-38065, CVE-2025-38066, CVE-2025-38068,
   CVE-2025-38072, CVE-2025-38075, CVE-2025-38077, CVE-2025-38078,
   CVE-2025-38079

Package Information:
   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1087.93
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1086.91

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