Ubuntu 24.04: Security Advisory USN-7725-3 for Kernel Issues (Critical)

ubuntu

September 2, 2025

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-nvidia: Linux kernel for NVIDIA systems

- linux-nvidia-lowlatency: Linux low latency kernel for NVIDIA systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-6.8: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe-6.8: Linux hardware enablement (HWE) kernel

- linux-nvidia-6.8: Linux kernel for NVIDIA 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:

- Overlay file system;

- Network traffic control;

(CVE-2025-21887, CVE-2024-57996, CVE-2025-38350, CVE-2025-37752)

Topics Covered

security advisory Ubuntu kernel system compromise network control gcp

Update Instructions

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

Ubuntu 24.04 LTS
   linux-image-6.8.0-1020-gkeop    6.8.0-1020.22
   linux-image-6.8.0-1033-gke      6.8.0-1033.37
   linux-image-6.8.0-1036-nvidia   6.8.0-1036.39
   linux-image-6.8.0-1036-nvidia-64k  6.8.0-1036.39
   linux-image-6.8.0-1036-nvidia-lowlatency  6.8.0-1036.39.1
   linux-image-6.8.0-1036-nvidia-lowlatency-64k  6.8.0-1036.39.1
   linux-image-6.8.0-1036-raspi    6.8.0-1036.40
   linux-image-gke                 6.8.0-1033.37
   linux-image-gke-6.8             6.8.0-1033.37
   linux-image-gkeop               6.8.0-1020.22
   linux-image-gkeop-6.8           6.8.0-1020.22
   linux-image-nvidia              6.8.0-1036.39
   linux-image-nvidia-6.8          6.8.0-1036.39
   linux-image-nvidia-64k          6.8.0-1036.39
   linux-image-nvidia-64k-6.8      6.8.0-1036.39
   linux-image-nvidia-lowlatency   6.8.0-1036.39.1
   linux-image-nvidia-lowlatency-6.8  6.8.0-1036.39.1
   linux-image-nvidia-lowlatency-64k  6.8.0-1036.39.1
   linux-image-nvidia-lowlatency-64k-6.8  6.8.0-1036.39.1
   linux-image-raspi               6.8.0-1036.40
   linux-image-raspi-6.8           6.8.0-1036.40

Ubuntu 22.04 LTS
   linux-image-6.8.0-1036-nvidia   6.8.0-1036.39~22.04.1
   linux-image-6.8.0-1036-nvidia-64k  6.8.0-1036.39~22.04.1
   linux-image-6.8.0-1037-gcp      6.8.0-1037.39~22.04.1
   linux-image-6.8.0-1037-gcp-64k  6.8.0-1037.39~22.04.1
   linux-image-6.8.0-79-generic    6.8.0-79.79~22.04.1
   linux-image-6.8.0-79-generic-64k  6.8.0-79.79~22.04.1
   linux-image-gcp                 6.8.0-1037.39~22.04.1
   linux-image-gcp-6.8             6.8.0-1037.39~22.04.1
   linux-image-gcp-64k             6.8.0-1037.39~22.04.1
   linux-image-gcp-64k-6.8         6.8.0-1037.39~22.04.1
   linux-image-generic-6.8         6.8.0-79.79~22.04.1
   linux-image-generic-64k-6.8     6.8.0-79.79~22.04.1
   linux-image-generic-64k-hwe-22.04  6.8.0-79.79~22.04.1
   linux-image-generic-hwe-22.04   6.8.0-79.79~22.04.1
   linux-image-nvidia-6.8          6.8.0-1036.39~22.04.1
   linux-image-nvidia-64k-6.8      6.8.0-1036.39~22.04.1
   linux-image-nvidia-64k-hwe-22.04  6.8.0-1036.39~22.04.1
   linux-image-nvidia-hwe-22.04    6.8.0-1036.39~22.04.1
   linux-image-oem-22.04           6.8.0-79.79~22.04.1
   linux-image-oem-22.04a          6.8.0-79.79~22.04.1
   linux-image-oem-22.04b          6.8.0-79.79~22.04.1
   linux-image-oem-22.04c          6.8.0-79.79~22.04.1
   linux-image-oem-22.04d          6.8.0-79.79~22.04.1
   linux-image-virtual-6.8         6.8.0-79.79~22.04.1
   linux-image-virtual-hwe-22.04   6.8.0-79.79~22.04.1

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.