USN-7299-3: X.Org X Server regression

Publication date

12 March 2025

Overview

USN-7299-2 caused a regression in X.Org X Server.


Packages

Details

USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused
regression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update
reverts it pending further investigation.

Original advisory 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, or possibly execute
arbitrary code.

USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused
regression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update
reverts it pending further investigation.

Original advisory 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, or possibly execute
arbitrary code.

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic xserver-xorg-core –  2:1.19.6-1ubuntu4.15+esm11  
xserver-xorg-core-hwe-18.04 –  2:1.20.8-2ubuntu2.2~18.04.11+esm3  
xwayland –  2:1.19.6-1ubuntu4.15+esm11  
xwayland-hwe-18.04 –  2:1.20.8-2ubuntu2.2~18.04.11+esm3  
16.04 xenial xserver-xorg-core –  2:1.18.4-0ubuntu0.12+esm16  
xserver-xorg-core-hwe-16.04 –  2:1.19.6-1ubuntu4.1~16.04.6+esm8  
xwayland –  2:1.18.4-0ubuntu0.12+esm16  
xwayland-hwe-16.04 –  2:1.19.6-1ubuntu4.1~16.04.6+esm8  

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