USN-5740-1: X.Org X Server vulnerabilities

23 November 2022

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

Releases

Packages

xorg-server - X.Org X11 server
xorg-server-hwe-16.04 - X.Org X11 server
xorg-server-hwe-18.04 - X.Org X11 server
xwayland - X server for running X clients under Wayland

Details

It was discovered that X.Org X Server incorrectly handled certain inputs.
An attacker could use these issues to cause the server to crash, resulting
in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 22.10

Ubuntu 22.04

Ubuntu 20.04

Ubuntu 18.04

Ubuntu 16.04

xwayland - 2:1.18.4-0ubuntu0.12+esm4
Available with Ubuntu Pro (Infra-only)
xserver-xorg-core - 2:1.18.4-0ubuntu0.12+esm4
Available with Ubuntu Pro (Infra-only)
xserver-xorg-core-hwe-16.04 - 2:1.19.6-1ubuntu4.1~16.04.6+esm3
Available with Ubuntu Pro (Infra-only)

Ubuntu 14.04

xserver-xorg-core - 2:1.15.1-0ubuntu2.11+esm6
Available with Ubuntu Pro (Infra-only)

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

Security