Use After Free The advisory has been revoked - it doesn't affect any version of package xorg-server (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2510-XORGSERVER-15021926
- published17 Jan 2026
- disclosed25 Oct 2023
Introduced: 25 Oct 2023
CVE-2023-5574 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xorg-server package and not the xorg-server package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-5574
- https://security.netapp.com/advisory/ntap-20231130-0004/
- https://access.redhat.com/errata/RHSA-2024:2298
- https://access.redhat.com/security/cve/CVE-2023-5574
- https://bugzilla.redhat.com/show_bug.cgi?id=2244735
- https://lists.x.org/archives/xorg-announce/2023-October/003430.html