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Heap-based Buffer Overflow The advisory has been revoked - it doesn't affect any version of package tigervnc  (opens in a new tab)

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EPSS
1.42% (70th percentile)

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  • Snyk IDSNYK-RHEL9-TIGERVNC-10667294
  • published9 Jul 2025
  • disclosed16 Jan 2024
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Introduced: 16 Jan 2024

CVE-2024-21885  (opens in a new tab)
CWE-122  (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. 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.