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Ubuntu 22.04: Critical Security Issues in Linux Kernel USN-7726-4

ubuntu
Calendar Grey September 2, 2025
Dist Ubuntu Esm H88
Numerous vulnerabilities in the Linux kernel affecting Ubuntu have been mitigated with critical updates. Fortify your system’s protection today.
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-kvm: Linux kernel for cloud environments

- linux-ibm-5.15: Linux kernel for IBM 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:

- NTFS3 file system;

- Network traffic control;

(CVE-2024-27407, CVE-2024-57996, CVE-2025-37752, CVE-2025-38350)

Topics%20covered

Topics Covered

security advisory critical Ubuntu system compromise network threat Linux kernel

Update Instructions

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1087-kvm     5.15.0-1087.92
   linux-image-5.15.0-1088-gke     5.15.0-1088.94
   linux-image-gke                 5.15.0.1088.87
   linux-image-gke-5.15            5.15.0.1088.87
   linux-image-kvm                 5.15.0.1087.83
   linux-image-kvm-5.15            5.15.0.1087.83

Ubuntu 20.04 LTS
   linux-image-5.15.0-1085-ibm     5.15.0-1085.88~20.04.1
                                   Available with Ubuntu Pro
   linux-image-ibm                 5.15.0.1085.88~20.04.1
                                   Available with Ubuntu Pro
   linux-image-ibm-5.15            5.15.0.1085.88~20.04.1
                                   Available with Ubuntu Pro

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-7726-4

https://ubuntu.com/security/notices/USN-7726-3

https://ubuntu.com/security/notices/USN-7726-2

https://ubuntu.com/security/notices/USN-7726-1

CVE-2024-27407, CVE-2024-57996, CVE-2025-37752, CVE-2025-38350

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7726-4

Topics%20covered

Topics Covered

security advisory critical Ubuntu system compromise network threat Linux kernel

Package Information

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