CVE-2026-119727

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.

• CWE-122

• 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

Published

Oct 30, 2026

Last Modified

Oct 30, 2026

Status

Awaiting Analysis

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