Bug 2570762 (CVE-2026-125197) - CVE-2026-125197 ffmpeg: ffmpeg: Denial of Service via integer underflow in LCL decoder
Summary: CVE-2026-125197 ffmpeg: ffmpeg: Denial of Service via integer underflow in LC...
Keywords:
Status: NEW
Alias: CVE-2026-125197
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 20:20 UTC by OSIDB Bzimport
Modified: 2026-11-10 23:45 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-11-10 20:20:25 UTC 
FFmpeg through 9.0.2 contains an integer underflow in decode_frame() in libavcodec/lcldec.c that allows attackers to trigger a heap out-of-bounds read via short ZLIB packets with FLAG_MULTITHREAD. Attackers can supply a crafted AVI or MKV file with an LCL video stream whose packet is shorter than 8 bytes, bypassing length clamping to crash the decoding application.
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