Vulnerability in FFmpeg

[ Description ]Official description

FFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that allows attackers to leak heap memory into decoded pixels via short packed-BGR bitstreams. Attackers can craft a Huffyuv BGR24/BGRA video whose entropy data ends early, causing decode_slice() to add uninitialized s->temp[0] bytes into output frames, exposing heap contents.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund1 Nov 2026WID-SEC-2026-4282

  ffmpeg: Multiple vulnerabilities allow information disclosure Translated from German

  CVE-2026-120246CVE-2026-120210CVE-2026-120243+3 more CVEs

[ References ]References

• code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24869
• github.com/FFmpeg/FFmpeg
• github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/huffyuvdec.c
• github.com/FFmpeg/FFmpeg/commit/7c73707355708c846f718cca90096bc1a33c8989
• www.vulncheck.com/advisories/ffmpeg-2.3-through-9.0.2-huffyuv-decoder-uninitialized-hea…