USN-5986-1: X.Org X Server vulnerability

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• xorg-server - X.Org X11 server
• xorg-server-hwe-18.04 - 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 possibly use these issues to
cause the X Server to crash, execute arbitrary code, or escalate
privileges.

Update instructions

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

Ubuntu 22.10

• xserver-xorg-core - 2:21.1.4-2ubuntu1.7
• xwayland - 2:22.1.3-2ubuntu0.4

Ubuntu 22.04

• xserver-xorg-core - 2:21.1.3-2ubuntu2.9
• xwayland - 2:22.1.1-1ubuntu0.6

Ubuntu 20.04

• xserver-xorg-core - 2:1.20.13-1ubuntu1~20.04.8
• xwayland - 2:1.20.13-1ubuntu1~20.04.8

Ubuntu 18.04

• xserver-xorg-core - 2:1.19.6-1ubuntu4.15
• xwayland - 2:1.19.6-1ubuntu4.15
• xserver-xorg-core-hwe-18.04 - 2:1.20.8-2ubuntu2.2~18.04.11
• xwayland-hwe-18.04 - 2:1.20.8-2ubuntu2.2~18.04.11

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

References

• CVE-2023-1393