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Oracle libXrender Heap Overflow Vulnerability Patched

Oracle libXrender Heap Overflow Vulnerability Patched

First seen 30 Oct 2026, 11:48 UTC • •
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ThreatCluster AI
ThreatCluster •October 30, 2026 at 12:47 UTC
  • •CVE-2026-88807 is a high-severity heap overflow vulnerability in libXrender.
  • •Patches were released for affected Oracle Linux versions on 2026-10-28 and 2026-10-30.
  • •No active exploitation has been confirmed, but the risk remains significant.

Oracle has released updates addressing a heap overflow vulnerability in libXrender, identified as CVE-2026-88807, which allows code injection via the RenderQueryPictFormats function. The flaw affects multiple versions of libXrender across different Oracle Linux distributions, including versions 0.9.10-16 and 0.9.11-8.1. Users are advised to update their systems to the latest versions to mitigate the risk of exploitation. The vulnerability has a CVSS score of 8.9, indicating a high severity level. The patch was made available on 2026-10-28 for Oracle Linux 8 and 10, with additional updates for Oracle Linux 9 released on 2026-10-30. No has been reported as of now, but the potential for exploitation remains high due to the nature of the flaw.

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Timeline

2026-09-21
CVE-2026-88807 published
Oracle disclosed the heap overflow vulnerability in libXrender with a CVSS score of 8.9.
Linuxsecurity
2026-10-28
Oracle Linux 8 libXrender patch released
Oracle released a fix for the heap overflow vulnerability in libXrender for Oracle Linux 8.
Linuxsecurity
2026-10-30
Oracle Linux 9 libXrender patch released
Oracle released an update for libXrender addressing the heap overflow vulnerability for Oracle Linux 9.
Linuxsecurity

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Common questions

Which Oracle Linux versions are affected?
The vulnerability affects libXrender versions 0.9.10-16 for Oracle Linux 9 and 0.9.11-8.1 for Oracle Linux 10.
Is there any confirmed exploitation of this vulnerability?
No active exploitation has been reported as of now.
What should I do to protect my systems?
Update to the latest patched versions of libXrender as soon as possible.