Bug 2570254 (CVE-2026-125220) - CVE-2026-125220 ffmpeg: FFmpeg: Denial of Service via deadlock in Mimic decoder
Summary: CVE-2026-125220 ffmpeg: FFmpeg: Denial of Service via deadlock in Mimic decoder
Keywords:
Status: NEW
Alias: CVE-2026-125220
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-10 19:46 UTC by OSIDB Bzimport
Modified: 2026-11-10 21:47 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-11-10 19:46:14 UTC 
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.
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