Heap-based Buffer Overflow The advisory has been revoked - it doesn't affect any version of package libX11 (opens in a new tab)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-LIBX11-12419949
- published1 Sept 2025
- disclosed4 Oct 2023
Introduced: 4 Oct 2023
CVE-2023-43787 (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 libX11 package and not the libX11 package as distributed by RHEL.
A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.
References
- https://access.redhat.com/security/cve/CVE-2023-43787
- http://www.openwall.com/lists/oss-security/2024/01/24/9
- https://jfrog.com/blog/xorg-libx11-vulns-cve-2023-43786-cve-2023-43787-part-two/
- https://security.netapp.com/advisory/ntap-20231103-0006/
- https://access.redhat.com/errata/RHSA-2024:2145
- https://bugzilla.redhat.com/show_bug.cgi?id=2242254
- https://lists.debian.org/debian-lts-announce/2023/10/msg00005.html