Advisory Published

USN-6453-1: X.Org X Server vulnerabilities

First published: Wed Oct 25 2023(Updated: )

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled prepending values to certain properties. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. (CVE-2023-5367) Sri discovered that the X.Org X Server incorrectly handled detroying windows in certain legacy multi-screen setups. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. (CVE-2023-5380)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/xserver-xorg-core<2:21.1.7-3ubuntu2.1
2:21.1.7-3ubuntu2.1
=23.10
All of
ubuntu/xwayland<2:23.2.0-1ubuntu0.1
2:23.2.0-1ubuntu0.1
=23.10
All of
ubuntu/xserver-xorg-core<2:21.1.7-1ubuntu3.1
2:21.1.7-1ubuntu3.1
=23.04
All of
ubuntu/xwayland<2:22.1.8-1ubuntu1.1
2:22.1.8-1ubuntu1.1
=23.04
All of
ubuntu/xserver-xorg-core<2:21.1.4-2ubuntu1.7~22.04.2
2:21.1.4-2ubuntu1.7~22.04.2
=22.04
All of
ubuntu/xwayland<2:22.1.1-1ubuntu0.7
2:22.1.1-1ubuntu0.7
=22.04
All of
ubuntu/xserver-xorg-core<2:1.20.13-1ubuntu1~20.04.9
2:1.20.13-1ubuntu1~20.04.9
=20.04
All of
ubuntu/xwayland<2:1.20.13-1ubuntu1~20.04.9
2:1.20.13-1ubuntu1~20.04.9
=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is USN-6453-1.

  • What is the severity of USN-6453-1?

    The severity of USN-6453-1 is not specified in the provided information.

  • How does the X.Org X Server vulnerabilities impact Ubuntu?

    The X.Org X Server vulnerabilities could allow attackers to crash the X Server, execute arbitrary code, or escalate privileges on affected Ubuntu systems.

  • Which versions of Ubuntu are affected by this vulnerability?

    The versions of Ubuntu affected by this vulnerability include 23.10, 23.04, 22.04, and 20.04.

  • How can I fix the X.Org X Server vulnerabilities?

    To fix the X.Org X Server vulnerabilities, update the xserver-xorg-core and xwayland packages to the specified remedy versions provided in the advisory.

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