[USN-7725-3] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-7725-3
September 02, 2025

linux-gcp-6.8, linux-gke, linux-gkeop, linux-hwe-6.8, linux-nvidia,
linux-nvidia-6.8, linux-nvidia-lowlatency, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS
- 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-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)

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.

References:
https://ubuntu.com/security/notices/USN-7725-3
https://ubuntu.com/security/notices/USN-7725-2
https://ubuntu.com/security/notices/USN-7725-1
CVE-2024-57996, CVE-2025-21887, CVE-2025-37752, CVE-2025-38350

Package Information:
https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1033.37
https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1020.22
https://launchpad.net/ubuntu/+source/linux-nvidia/6.8.0-1036.39
https://launchpad.net/ubuntu/+source/linux-nvidia-lowlatency/6.8.0-1036.39.1
https://launchpad.net/ubuntu/+source/linux-raspi/6.8.0-1036.40
https://launchpad.net/ubuntu/+source/linux-gcp-6.8/6.8.0-1037.39~22.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-6.8/6.8.0-79.79~22.04.1
https://launchpad.net/ubuntu/+source/linux-nvidia-6.8/6.8.0-1036.39~22.04.1