CVE-2026-125254

Description

FFmpeg through 9.0.2 contains a division by zero vulnerability in the VVC decoder because ff_vvc_slice_rpl() fails to validate num_ref_idx_active against built reference list entries. Attackers can supply a crafted VVC bitstream whose excess reference indices yield a zero POC difference in ff_vvc_mv_scale(), crashing the decoding process.

Affected Platforms

Weakness Type

CWE-369

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25572
• https://github.com/FFmpeg/FFmpeg
• https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vvc/mvs.c#L77
• https://github.com/FFmpeg/FFmpeg/commit/8732d7585cd8ab9d1dd9baeb4db5e93466c0efa7
• https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-division-by-zero-via-v…