[USN-7725-1] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-7725-1
August 28, 2025

linux, linux-aws, linux-aws-6.8, linux-gcp, linux-lowlatency,
linux-lowlatency-hwe-6.8, linux-oracle, linux-oracle-6.8 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-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems
- linux-lowlatency-hwe-6.8: Linux low latency kernel
- linux-oracle-6.8: Linux kernel for Oracle Cloud 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-6.8.0-1033-oracle   6.8.0-1033.34
   linux-image-6.8.0-1033-oracle-64k  6.8.0-1033.34
   linux-image-6.8.0-1036-aws      6.8.0-1036.38
   linux-image-6.8.0-1036-aws-64k  6.8.0-1036.38
   linux-image-6.8.0-1037-gcp      6.8.0-1037.39
   linux-image-6.8.0-1037-gcp-64k  6.8.0-1037.39
   linux-image-6.8.0-79-generic    6.8.0-79.79
   linux-image-6.8.0-79-generic-64k  6.8.0-79.79
   linux-image-6.8.0-79-lowlatency  6.8.0-79.79.1
   linux-image-6.8.0-79-lowlatency-64k  6.8.0-79.79.1
   linux-image-aws-6.8             6.8.0-1036.38
   linux-image-aws-64k-6.8         6.8.0-1036.38
   linux-image-aws-64k-lts-24.04   6.8.0-1036.38
   linux-image-aws-lts-24.04       6.8.0-1036.38
   linux-image-gcp-6.8             6.8.0-1037.39
   linux-image-gcp-64k-6.8         6.8.0-1037.39
   linux-image-gcp-64k-lts-24.04   6.8.0-1037.39
   linux-image-gcp-lts-24.04       6.8.0-1037.39
   linux-image-generic             6.8.0-79.79
   linux-image-generic-6.8         6.8.0-79.79
   linux-image-generic-64k         6.8.0-79.79
   linux-image-generic-64k-6.8     6.8.0-79.79
   linux-image-generic-lpae        6.8.0-79.79
   linux-image-kvm                 6.8.0-79.79
   linux-image-lowlatency          6.8.0-79.79.1
   linux-image-lowlatency-6.8      6.8.0-79.79.1
   linux-image-lowlatency-64k      6.8.0-79.79.1
   linux-image-lowlatency-64k-6.8  6.8.0-79.79.1
   linux-image-oracle-6.8          6.8.0-1033.34
   linux-image-oracle-64k-6.8      6.8.0-1033.34
   linux-image-oracle-64k-lts-24.04  6.8.0-1033.34
   linux-image-oracle-lts-24.04    6.8.0-1033.34
   linux-image-virtual             6.8.0-79.79
   linux-image-virtual-6.8         6.8.0-79.79

Ubuntu 22.04 LTS
   linux-image-6.8.0-1033-oracle   6.8.0-1033.34~22.04.1
   linux-image-6.8.0-1033-oracle-64k  6.8.0-1033.34~22.04.1
   linux-image-6.8.0-1036-aws      6.8.0-1036.38~22.04.1
   linux-image-6.8.0-1036-aws-64k  6.8.0-1036.38~22.04.1
   linux-image-6.8.0-79-lowlatency  6.8.0-79.79.1~22.04.1
   linux-image-6.8.0-79-lowlatency-64k  6.8.0-79.79.1~22.04.1
   linux-image-aws                 6.8.0-1036.38~22.04.1
   linux-image-aws-6.8             6.8.0-1036.38~22.04.1
   linux-image-aws-64k             6.8.0-1036.38~22.04.1
   linux-image-aws-64k-6.8         6.8.0-1036.38~22.04.1
   linux-image-lowlatency-6.8      6.8.0-79.79.1~22.04.1
   linux-image-lowlatency-64k-6.8  6.8.0-79.79.1~22.04.1
   linux-image-lowlatency-64k-hwe-22.04  6.8.0-79.79.1~22.04.1
   linux-image-lowlatency-hwe-22.04  6.8.0-79.79.1~22.04.1
   linux-image-oracle              6.8.0-1033.34~22.04.1
   linux-image-oracle-6.8          6.8.0-1033.34~22.04.1
   linux-image-oracle-64k          6.8.0-1033.34~22.04.1
   linux-image-oracle-64k-6.8      6.8.0-1033.34~22.04.1

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-7725-1
   CVE-2024-57996, CVE-2025-21887, CVE-2025-37752, CVE-2025-38350

Package Information:
   https://launchpad.net/ubuntu/+source/linux/6.8.0-79.79
   https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1036.38
   https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1037.39
   https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-79.79.1
   https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1033.34
   https://launchpad.net/ubuntu/+source/linux-aws-6.8/6.8.0-1036.38~22.04.1
  
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-79.79.1~22.04.1
   https://launchpad.net/ubuntu/+source/linux-oracle-6.8/6.8.0-1033.34~22.04.1

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