A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.
Fixes

Solution

No solution given by the vendor.


Workaround

Starting Xvfb with the -noreset command line option limits the use-after-free from being triggered only at the Xvfb server shutdown. Also, do not start Xvfb as root.

History

Fri, 22 Nov 2024 12:00:00 +0000

Type Values Removed Values Added
References

Mon, 16 Sep 2024 17:45:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-07-30T12:41:23.179Z

Reserved: 2023-10-13T11:35:44.857Z

Link: CVE-2023-5574

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-10-25T20:15:18.717

Modified: 2024-11-21T08:42:02.790

Link: CVE-2023-5574

cve-icon Redhat

Severity : Important

Publid Date: 2023-10-25T00:00:00Z

Links: CVE-2023-5574 - Bugzilla

cve-icon OpenCVE Enrichment

No data.