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[USN-7793-5] Linux kernel (GKE) vulnerabilities

Posted on 08 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7793-5
October 08, 2025

linux-gke 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

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:
- Packet sockets;
- Network traffic control;
- VMware vSockets driver;
(CVE-2025-38477, CVE-2025-38617, CVE-2025-38618)

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-5.15.0-1090-gke 5.15.0-1090.96
linux-image-gke 5.15.0.1090.89
linux-image-gke-5.15 5.15.0.1090.89

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-7793-5
https://ubuntu.com/security/notices/USN-7793-4
https://ubuntu.com/security/notices/USN-7793-3
https://ubuntu.com/security/notices/USN-7793-2
https://ubuntu.com/security/notices/USN-7793-1
CVE-2025-38477, CVE-2025-38617, CVE-2025-38618

Package Information:
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1090.96


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