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Use After Free The advisory has been revoked - it doesn't affect any version of package tigervnc  (opens in a new tab)

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EPSS
0.44% (35th percentile)

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  • Snyk IDSNYK-RHEL9-TIGERVNC-10666857
  • published9 Jul 2025
  • disclosed29 Mar 2023
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Introduced: 29 Mar 2023

CVE-2023-1393  (opens in a new tab)
CWE-416  (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 package and not the tigervnc package as distributed by RHEL.

A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

References