Ubuntu 25.04: USN-7573-1 critical: xorg-server denial of service

ubuntu

June 17, 2025

Several security issues were fixed in X.Org X Server.

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:

Nils Emmerich 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 Covered

security advisory denial of service critical ubuntu xorg-server xwayland

Update Instructions

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

Ubuntu 25.04
   xserver-xorg-core               2:21.1.16-1ubuntu1.1
   xwayland                        2:24.1.6-1ubuntu0.1

Ubuntu 24.10
   xserver-xorg-core               2:21.1.13-2ubuntu1.4
   xwayland                        2:24.1.2-1ubuntu0.6

Ubuntu 24.04 LTS
   xserver-xorg-core               2:21.1.12-1ubuntu1.4
   xwayland                        2:23.2.6-1ubuntu0.6

Ubuntu 22.04 LTS
   xserver-xorg-core               2:21.1.4-2ubuntu1.7~22.04.15
   xwayland                        2:22.1.1-1ubuntu0.19

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