Alerts This Week
Warning Icon 1 652
Alerts This Week
Warning Icon 1 652

Ubuntu 24.04 LTS Linux Realtime Kernel Critical SMB Threat USN-8059-4

ubuntu
Calendar Grey February 25, 2026
Dist Ubuntu Esm H88
Critical security issues fixed in Ubuntu Linux kernel - ensure your system is updated for safe operation.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-realtime: Linux kernel for Real-time systems

- linux-realtime-6.8: Linux kernel for Real-time 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:

- SMB network file system;

(CVE-2025-22037, CVE-2025-37899)

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel issue system compromise linux-realtime

Update Instructions

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

Ubuntu 24.04 LTS
  linux-image-6.8.1-1042-realtime  6.8.1-1042.43
                                  Available with Ubuntu Pro
  linux-image-intel-iot-realtime  6.8.1-1042.43
                                  Available with Ubuntu Pro
  linux-image-realtime            6.8.1-1042.43
                                  Available with Ubuntu Pro
  linux-image-realtime-6.8.1      6.8.1-1042.43
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  linux-image-6.8.1-1042-realtime  6.8.1-1042.43~22.04.1
                                  Available with Ubuntu Pro
  linux-image-realtime-6.8.1      6.8.1-1042.43~22.04.1
                                  Available with Ubuntu Pro
  linux-image-realtime-hwe-22.04  6.8.1-1042.43~22.04.1
                                  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-8059-4

https://ubuntu.com/security/notices/USN-8059-3

https://ubuntu.com/security/notices/USN-8059-2

https://ubuntu.com/security/notices/USN-8059-1

CVE-2025-22037, CVE-2025-37899

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8059-4

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel issue system compromise linux-realtime

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here