CVE-2026-125220

Description

FFmpeg through 9.0.2 contains a deadlock vulnerability in mimic_decode_frame() in libavcodec/mimic.c that fails to report frame progress when init_get_bits8() fails. Attackers can supply a crafted file with an oversized Mimic intra frame followed by inter frames to hang frame-threaded decoding indefinitely.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25718 ↗
• https://github.com/FFmpeg/FFmpeg/commit/db77b0b8318ddb38b5a3227724da088a325a4308 ↗
• https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/mimic.c#L403 ↗
• https://github.com/FFmpeg/FFmpeg ↗
• https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-mimic-decoder-deadlock-via-frame-threading-failure ↗