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USN-5193-1: X.Org X Server vulnerabilities

14 December 2021

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




Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain inputs. An attacker could use this issue to cause the server to
crash, resulting in a denial of service, or possibly execute arbitrary
code and escalate privileges.

Update instructions

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

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

  • USN-5193-2: xnest, xwayland, xdmx, xorg-server-source, xmir, xserver-xorg-dev, xserver-xorg-legacy, xserver-common, xorg-server, xserver-xorg-core, xserver-xorg-xmir, xserver-xephyr, xvfb, xdmx-tools