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Ubuntu 22.04 LTS: USN-7726-5 Linux Kernel Critical Issues Detected

ubuntu
Calendar Grey September 18, 2025
Dist Ubuntu Esm H88
Ubuntu has issued essential updates addressing critical kernel vulnerabilities for Azure deployments in the USN-7726-5 advisory, ensuring enhanced security measures.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS

- linux-azure-5.15: Linux kernel for Microsoft Azure 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 kernel network ntfs3

Update Instructions

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1095-azure   5.15.0-1095.104
   linux-image-5.15.0-1095-azure-fips  5.15.0-1095.104+fips1
                                   Available with Ubuntu Pro
   linux-image-azure-5.15          5.15.0.1095.93
   linux-image-azure-fips          5.15.0.1095.80
                                   Available with Ubuntu Pro
   linux-image-azure-fips-5.15     5.15.0.1095.80
                                   Available with Ubuntu Pro
   linux-image-azure-lts-22.04     5.15.0.1095.93

Ubuntu 20.04 LTS
   linux-image-5.15.0-1095-azure   5.15.0-1095.104~20.04.1
                                   Available with Ubuntu Pro
   linux-image-azure               5.15.0.1095.104~20.04.1
                                   Available with Ubuntu Pro
   linux-image-azure-5.15          5.15.0.1095.104~20.04.1
                                   Available with Ubuntu Pro
   linux-image-azure-cvm           5.15.0.1095.104~20.04.1
                                   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-7726-5

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-7726-5

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel network ntfs3

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1095.104

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