High severity7.8NVD Advisory· Published Nov 9, 2026
CVE-2026-125244
CVE-2026-125244
Description
FFmpeg before 8.1.3 and 9.x before 9.0.2 contains an out-of-bounds write vulnerability in the VVC decoder's sh_entry_points() function in libavcodec/vvc/ps.c. Attackers can supply a crafted VVC (H.266) bitstream whose SPS/PPS tile and WPP layout produces excess entry points, overflowing entry_point_start_ctu and corrupting decoder memory.
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Affected products
1Patches
Vulnerability mechanics
References
4- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24537nvd
- github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/vvc/ps.cnvd
- github.com/FFmpeg/FFmpeg/commit/a809a784ec9ff9910161c6c9554a041941d6cccenvd
- www.vulncheck.com/advisories/ffmpeg-before-8.1.3-and-9-x-before-9.0.2-vvc-decoder-out-of-bounds-write-via-sh-entry-pointsnvd
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