high
7.8
CWE
119 122 120
Advisory Published
CVE Published
Updated

CVE-2024-21885: Xorg-x11-server: heap buffer overflow in xisenddevicehierarchyevent

First published: Tue Jan 02 2024(Updated: )

A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution in SSH X11 forwarding environments.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/xorg-server<21.1.11
21.1.11
redhat/xwayland<23.2.4
23.2.4
debian/xorg-server
2:1.20.11-1+deb11u13
2:1.20.11-1+deb11u15
2:21.1.7-3+deb12u9
2:21.1.16-1
debian/xwayland<=2:22.1.9-1
2:24.1.6-1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-21885?

    CVE-2024-21885 is classified as a high severity vulnerability due to the potential for a heap buffer overflow.

  • How do I fix CVE-2024-21885?

    To remediate CVE-2024-21885, update the X.Org server to version 21.1.11 or the Xwayland to version 23.2.4, or apply the specified patches from your Linux distribution.

  • What impact does CVE-2024-21885 have on my system?

    CVE-2024-21885 can lead to application crashes or arbitrary code execution due to a heap buffer overflow caused by adding certain new device IDs.

  • Which software versions are affected by CVE-2024-21885?

    CVE-2024-21885 affects specific versions of the X.Org server and Xwayland, particularly those before the fixed versions of 21.1.11 and 23.2.4 respectively.

  • Is there a known exploit for CVE-2024-21885?

    As of now, there are no publicly available exploits specifically targeting CVE-2024-21885, but the vulnerability itself poses significant risk.

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