==========================================================================
Ubuntu Security Notice USN-7792-1
October 01, 2025

linux, linux-aws, linux-gcp, linux-gcp-6.8, linux-gke, linux-gkeop,
linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8,
linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency 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: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-lowlatency: Linux low latency kernel
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-nvidia-lowlatency: Linux low latency kernel for NVIDIA systems
- linux-gcp-6.8: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm-6.8: Linux kernel for IBM cloud systems
- linux-lowlatency-hwe-6.8: Linux low latency 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:
  - Ext4 file system;
  - Network traffic control;
  - TLS protocol;
  - VMware vSockets driver;
  - XFRM subsystem;
(CVE-2025-38618, CVE-2025-38500, CVE-2025-37785, CVE-2025-38477,
CVE-2025-37756)

Update instructions:

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

Ubuntu 24.04 LTS
  linux-image-6.8.0-1024-gkeop    6.8.0-1024.26
  linux-image-6.8.0-1037-gke      6.8.0-1037.41
  linux-image-6.8.0-1037-gke-64k  6.8.0-1037.41
  linux-image-6.8.0-1038-ibm      6.8.0-1038.38
  linux-image-6.8.0-1040-aws      6.8.0-1040.42
  linux-image-6.8.0-1040-aws-64k  6.8.0-1040.42
  linux-image-6.8.0-1040-nvidia   6.8.0-1040.43
  linux-image-6.8.0-1040-nvidia-64k  6.8.0-1040.43
  linux-image-6.8.0-1040-nvidia-lowlatency  6.8.0-1040.43.1
  linux-image-6.8.0-1040-nvidia-lowlatency-64k  6.8.0-1040.43.1
  linux-image-6.8.0-1041-gcp      6.8.0-1041.43
  linux-image-6.8.0-1041-gcp-64k  6.8.0-1041.43
  linux-image-6.8.0-85-generic    6.8.0-85.85
  linux-image-6.8.0-85-generic-64k  6.8.0-85.85
  linux-image-6.8.0-85-lowlatency  6.8.0-85.85.1
  linux-image-6.8.0-85-lowlatency-64k  6.8.0-85.85.1
  linux-image-aws-6.8             6.8.0-1040.42
  linux-image-aws-64k-6.8         6.8.0-1040.42
  linux-image-aws-64k-lts-24.04   6.8.0-1040.42
  linux-image-aws-lts-24.04       6.8.0-1040.42
  linux-image-gcp-6.8             6.8.0-1041.43
  linux-image-gcp-64k-6.8         6.8.0-1041.43
  linux-image-gcp-64k-lts-24.04   6.8.0-1041.43
  linux-image-gcp-lts-24.04       6.8.0-1041.43
  linux-image-generic             6.8.0-85.85
  linux-image-generic-6.8         6.8.0-85.85
  linux-image-generic-64k         6.8.0-85.85
  linux-image-generic-64k-6.8     6.8.0-85.85
  linux-image-generic-lpae        6.8.0-85.85
  linux-image-gke                 6.8.0-1037.41
  linux-image-gke-6.8             6.8.0-1037.41
  linux-image-gke-64k             6.8.0-1037.41
  linux-image-gke-64k-6.8         6.8.0-1037.41
  linux-image-gkeop               6.8.0-1024.26
  linux-image-gkeop-6.8           6.8.0-1024.26
  linux-image-ibm                 6.8.0-1038.38
  linux-image-ibm-6.8             6.8.0-1038.38
  linux-image-ibm-classic         6.8.0-1038.38
  linux-image-ibm-lts-24.04       6.8.0-1038.38
  linux-image-kvm                 6.8.0-85.85
  linux-image-lowlatency          6.8.0-85.85.1
  linux-image-lowlatency-6.8      6.8.0-85.85.1
  linux-image-lowlatency-64k      6.8.0-85.85.1
  linux-image-lowlatency-64k-6.8  6.8.0-85.85.1
  linux-image-nvidia              6.8.0-1040.43
  linux-image-nvidia-6.8          6.8.0-1040.43
  linux-image-nvidia-64k          6.8.0-1040.43
  linux-image-nvidia-64k-6.8      6.8.0-1040.43
  linux-image-nvidia-lowlatency   6.8.0-1040.43.1
  linux-image-nvidia-lowlatency-6.8  6.8.0-1040.43.1
  linux-image-nvidia-lowlatency-64k  6.8.0-1040.43.1
  linux-image-nvidia-lowlatency-64k-6.8  6.8.0-1040.43.1
  linux-image-virtual             6.8.0-85.85
  linux-image-virtual-6.8         6.8.0-85.85

Ubuntu 22.04 LTS
  linux-image-6.8.0-1038-ibm      6.8.0-1038.38~22.04.1
  linux-image-6.8.0-1040-nvidia   6.8.0-1040.43~22.04.1
  linux-image-6.8.0-1040-nvidia-64k  6.8.0-1040.43~22.04.1
  linux-image-6.8.0-1041-gcp      6.8.0-1041.43~22.04.1
  linux-image-6.8.0-1041-gcp-64k  6.8.0-1041.43~22.04.1
  linux-image-6.8.0-85-lowlatency  6.8.0-85.85.1~22.04.1
  linux-image-6.8.0-85-lowlatency-64k  6.8.0-85.85.1~22.04.1
  linux-image-gcp                 6.8.0-1041.43~22.04.1
  linux-image-gcp-6.8             6.8.0-1041.43~22.04.1
  linux-image-gcp-64k             6.8.0-1041.43~22.04.1
  linux-image-gcp-64k-6.8         6.8.0-1041.43~22.04.1
  linux-image-ibm-6.8             6.8.0-1038.38~22.04.1
  linux-image-lowlatency-6.8      6.8.0-85.85.1~22.04.1
  linux-image-lowlatency-64k-6.8  6.8.0-85.85.1~22.04.1
  linux-image-lowlatency-64k-hwe-22.04  6.8.0-85.85.1~22.04.1
  linux-image-lowlatency-hwe-22.04  6.8.0-85.85.1~22.04.1
  linux-image-nvidia-6.8          6.8.0-1040.43~22.04.1
  linux-image-nvidia-64k-6.8      6.8.0-1040.43~22.04.1
  linux-image-nvidia-64k-hwe-22.04  6.8.0-1040.43~22.04.1
  linux-image-nvidia-hwe-22.04    6.8.0-1040.43~22.04.1

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-7792-1
  CVE-2025-37756, CVE-2025-37785, CVE-2025-38477, CVE-2025-38500,
  CVE-2025-38618

Package Information:
  https://launchpad.net/ubuntu/+source/linux/6.8.0-85.85
  https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1040.42
  https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1041.43
  https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1037.41
  https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1024.26
  https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1038.38
  https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-85.85.1
  https://launchpad.net/ubuntu/+source/linux-nvidia/6.8.0-1040.43
  https://launchpad.net/ubuntu/+source/linux-nvidia-lowlatency/6.8.0-1040.43.1
  https://launchpad.net/ubuntu/+source/linux-gcp-6.8/6.8.0-1041.43~22.04.1
  https://launchpad.net/ubuntu/+source/linux-ibm-6.8/6.8.0-1038.38~22.04.1
  https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-85.85.1~22.04.1
  https://launchpad.net/ubuntu/+source/linux-nvidia-6.8/6.8.0-1040.43~22.04.1