Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24869
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/huffyuvdec.c#L802
- https://github.com/FFmpeg/FFmpeg/commit/7c73707355708c846f718cca90096bc1a33c8989
- https://www.vulncheck.com/advisories/ffmpeg-2.3-through-9.0.2-huffyuv-decoder-un
FAQ
What is CVE-2026-120247?
CVE-2026-120247 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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. At...
How severe is CVE-2026-120247?
CVE-2026-120247 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-120247?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.