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Ubuntu 25.10: X.Org X Server Critical Memory Crash 2025-7846-1

ubuntu
Calendar Grey October 29, 2025
Dist Ubuntu Esm H88
Security updates for X.Org X Server in Ubuntu to fix critical memory handling issues leading to denial of service.
Several security issues were fixed in X.Org X Server.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 25.04 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in X.Org X Server. Software Description: - xorg-server: X.Org X11 server - xwayland: X server for running X clients under Wayland Details: Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain memory operations. An attacker could use these issues to cause the X Server to crash, leading to a denial of service, obtain sensitive information, or possibly execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu Xorg server Xwayland memory operation

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 xserver-xorg-core 2:21.1.18-1ubuntu1.1 xwayland 2:24.1.6-1ubuntu1.1 Ubuntu 25.04 xserver-xorg-core 2:21.1.16-1ubuntu1.2 xwayland 2:24.1.6-1ubuntu0.2 Ubuntu 24.04 LTS xserver-xorg-core 2:21.1.12-1ubuntu1.5 xwayland 2:23.2.6-1ubuntu0.7 Ubuntu 22.04 LTS xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.16 xwayland 2:22.1.1-1ubuntu0.20 After a standard system update you need to reboot your computer to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7846-1

CVE-2025-62229, CVE-2025-62230, CVE-2025-62231

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7846-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu Xorg server Xwayland memory operation

Package Information

https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.18-1ubuntu1.1 https://launchpad.net/ubuntu/+source/xwayland/2:24.1.6-1ubuntu1.1 https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.16-1ubuntu1.2 https://launchpad.net/ubuntu/+source/xwayland/2:24.1.6-1ubuntu0.2 https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.12-1ubuntu1.5 https://launchpad.net/ubuntu/+source/xwayland/2:23.2.6-1ubuntu0.7 https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.4-2ubuntu1.7~22.04.16 https://launchpad.net/ubuntu/+source/xwayland/2:22.1.1-1ubuntu0.20

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