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Ubuntu 24.04 22.04: Linux Kernel Critical Security Update USN-7799-1

ubuntu
Calendar Grey October 2, 2025
Dist Ubuntu Esm H88
Addressing critical issues in the Ubuntu Linux kernel that could compromise system stability; follow updates for restoration.
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:

- Ext4 file system;

- Packet sockets;

- Network traffic control;

- TLS protocol;

- VMware vSockets driver;

- XFRM subsystem;

(CVE-2025-38500, CVE-2025-38617, CVE-2025-38477, CVE-2025-37785,

CVE-2025-38618, CVE-2025-37756)

Topics%20covered

Topics Covered

security advisory kernel update critical Ubuntu 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-6.8.1-1035-realtime  6.8.1-1035.36
                                  Available with Ubuntu Pro
  linux-image-realtime            6.8.1-1035.36
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  linux-image-realtime-6.8.1      6.8.1-1035.36
                                  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-7799-1

CVE-2025-37756, CVE-2025-37785, CVE-2025-38477, CVE-2025-38500,

CVE-2025-38617, CVE-2025-38618

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7799-1

Topics%20covered

Topics Covered

security advisory kernel update critical Ubuntu system compromise linux-realtime

Package Information

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