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[USN-7846-1] X.Org X Server vulnerabilities

Posted on 29 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7846-1
October 29, 2025

xorg-server, xwayland vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

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:

Jan-Niklas Sohn 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.

Update instructions:

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

Ubuntu 25.10
xserver-xorg-core 2:21.1.18-1ubuntu1.1
xwayland 2:24.1.6-1ubuntu1.1

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

Ubuntu 24.04 LTS
xserver-xorg-core 2:21.1.12-1ubuntu1.5
xwayland 2:23.2.6-1ubuntu0.7

Ubuntu 22.04 LTS
xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.16
xwayland 2:22.1.1-1ubuntu0.20

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

References:
https://ubuntu.com/security/notices/USN-7846-1
CVE-2025-62229, CVE-2025-62230, CVE-2025-62231

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.18-1ubuntu1.1
https://launchpad.net/ubuntu/+source/xwayland/2:24.1.6-1ubuntu1.1
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.16-1ubuntu1.2
https://launchpad.net/ubuntu/+source/xwayland/2:24.1.6-1ubuntu0.2
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.12-1ubuntu1.5
https://launchpad.net/ubuntu/+source/xwayland/2:23.2.6-1ubuntu0.7
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.4-2ubuntu1.7~22.04.16
https://launchpad.net/ubuntu/+source/xwayland/2:22.1.1-1ubuntu0.20

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