Advisory Published

USN-6587-1: X.Org X Server vulnerabilities

First published: Tue Jan 16 2024(Updated: )

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled memory when processing the DeviceFocusEvent and ProcXIQueryPointer APIs. An attacker could possibly use this issue to cause the X Server to crash, obtain sensitive information, or execute arbitrary code. (CVE-2023-6816) Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled reattaching to a different master device. An attacker could use this issue to cause the X Server to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2024-0229) Olivier Fourdan and Donn Seeley discovered that the X.Org X Server incorrectly labeled GLX PBuffers when used with SELinux. An attacker could use this issue to cause the X Server to crash, leading to a denial of service. (CVE-2024-0408) Olivier Fourdan discovered that the X.Org X Server incorrectly handled the curser code when used with SELinux. An attacker could use this issue to cause the X Server to crash, leading to a denial of service. (CVE-2024-0409) Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled memory when processing the XISendDeviceHierarchyEvent API. An attacker could possibly use this issue to cause the X Server to crash, or execute arbitrary code. (CVE-2024-21885) Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled devices being disabled. An attacker could possibly use this issue to cause the X Server to crash, or execute arbitrary code. (CVE-2024-21886)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/xserver-xorg-core<2:21.1.7-3ubuntu2.6
2:21.1.7-3ubuntu2.6
Ubuntu=23.10
All of
ubuntu/xwayland<2:23.2.0-1ubuntu0.4
2:23.2.0-1ubuntu0.4
Ubuntu=23.10
All of
ubuntu/xserver-xorg-core<2:21.1.7-1ubuntu3.6
2:21.1.7-1ubuntu3.6
Ubuntu=23.04
All of
ubuntu/xwayland<2:22.1.8-1ubuntu1.4
2:22.1.8-1ubuntu1.4
Ubuntu=23.04
All of
ubuntu/xserver-xorg-core<2:21.1.4-2ubuntu1.7~22.04.7
2:21.1.4-2ubuntu1.7~22.04.7
Ubuntu=22.04
All of
ubuntu/xwayland<2:22.1.1-1ubuntu0.10
2:22.1.1-1ubuntu0.10
Ubuntu=22.04
All of
ubuntu/xserver-xorg-core<2:1.20.13-1ubuntu1~20.04.14
2:1.20.13-1ubuntu1~20.04.14
Ubuntu=20.04
All of
ubuntu/xwayland<2:1.20.13-1ubuntu1~20.04.14
2:1.20.13-1ubuntu1~20.04.14
Ubuntu=20.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6587-1?

    USN-6587-1 is classified as a high-severity vulnerability that could lead to a crash of the X Server or execution of arbitrary code.

  • How do I fix USN-6587-1?

    To fix USN-6587-1, upgrade to the latest package versions indicated in the advisory for your Ubuntu release.

  • What are the affected products in USN-6587-1?

    The affected products include the xserver-xorg-core and xwayland packages on various versions of Ubuntu, such as 20.04, 22.04, and 23.04.

  • Can USN-6587-1 lead to data loss?

    Yes, USN-6587-1 may potentially allow an attacker to obtain sensitive information, leading to data exposure.

  • What specific APIs are impacted by USN-6587-1?

    USN-6587-1 affects the DeviceFocusEvent and ProcXIQueryPointer APIs in the X.Org X Server.

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