CVE-2026-125253
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Nov 09, 2026
Vendor
unknown
Description
FFmpeg through 9.0.2 contains an integer overflow in cbs_vp9_split_fragment() in libavcodec/cbs_vp9.c that wraps the superframe size check on 32-bit builds. Attackers can supply a crafted VP9 packet with a forged superframe index containing near-2^32 frame sizes, causing out-of-bounds reads that crash 32-bit applications.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25232
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/cbs_vp9.c#L400
- https://github.com/FFmpeg/FFmpeg/commit/6280907da48c4dd78f95ef5c713a29c7702153a3
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vp9-cbs-superframe-integer-overflow-out-of-bounds-read