==========================================================================
Ubuntu Security Notice USN-5510-1
July 12, 2022

xorg-server, xorg-server-hwe-18.04, xwayland vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

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

Software Description:
- xorg-server: X.Org X11 server
- xwayland: Xwayland X server
- xorg-server-hwe-18.04: X.Org X11 server

Details:

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 22.04 LTS:
  xserver-xorg-core               2:21.1.3-2ubuntu2.1
  xwayland                        2:22.1.1-1ubuntu0.1

Ubuntu 21.10:
  xserver-xorg-core               2:1.20.13-1ubuntu1.2
  xwayland                        2:21.1.2-0ubuntu1.2

Ubuntu 20.04 LTS:
  xserver-xorg-core               2:1.20.13-1ubuntu1~20.04.3
  xwayland                        2:1.20.13-1ubuntu1~20.04.3

Ubuntu 18.04 LTS:
  xserver-xorg-core               2:1.19.6-1ubuntu4.11
  xserver-xorg-core-hwe-18.04     2:1.20.8-2ubuntu2.2~18.04.7
  xwayland                        2:1.19.6-1ubuntu4.11
  xwayland-hwe-18.04              2:1.20.8-2ubuntu2.2~18.04.7

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

References:
  https://ubuntu.com/security/notices/USN-5510-1
  CVE-2022-2319, CVE-2022-2320

Package Information:
  https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.3-2ubuntu2.1
  https://launchpad.net/ubuntu/+source/xwayland/2:22.1.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.13-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/xwayland/2:21.1.2-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.13-1ubuntu1~20.04.3
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.19.6-1ubuntu4.11

https://launchpad.net/ubuntu/+source/xorg-server-hwe-18.04/2:1.20.8-2ubuntu2.2~18.04.7