Use After Free The advisory has been revoked - it doesn't affect any version of package tigervnc-selinux (opens in a new tab)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-RHEL9-TIGERVNCSELINUX-10666830
- published9 Jul 2025
- disclosed7 Feb 2023
Introduced: 7 Feb 2023
CVE-2023-0494 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tigervnc-selinux package and not the tigervnc-selinux package as distributed by RHEL.
A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.
References
- https://access.redhat.com/security/cve/CVE-2023-0494
- https://access.redhat.com/errata/RHSA-2023:0622
- https://bugzilla.redhat.com/show_bug.cgi?id=2165995
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdac55392ecf71ec
- https://lists.x.org/archives/xorg-announce/2023-February/003320.html
- https://security.gentoo.org/glsa/202305-30