Vulnerability Description
A flaw was found in GStreamer's gst-plugins-bad H.265 video parser. When parsing a specially crafted H.265 bitstream containing a Screen Content Coding (SCC) extension with certain palette predictor initializer settings, an integer underflow in the upper-bound computation allows the parser to accept an out-of-range value for the number of palette predictor entries. This causes the parser to write beyond the end of a fixed-size array, resulting in memory corruption and an application crash. Successful exploitation requires an attacker to provide a malformed H.265 media file to a vulnerable application, and is limited to a denial-of-service impact.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2026-119727
- https://bugzilla.redhat.com/show_bug.cgi?id=2564118
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/10902.patch
- https://gstreamer.freedesktop.org/security/sa-2026-0012.html
FAQ
What is CVE-2026-119727?
CVE-2026-119727 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A flaw was found in GStreamer's gst-plugins-bad H.265 video parser. When parsing a specially crafted H.265 bitstream containing a Screen Content Coding (SCC) extension with certain palette predictor i...
How severe is CVE-2026-119727?
CVE-2026-119727 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-119727?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.