Bug 2570677 (CVE-2026-125103) - CVE-2026-125103 ffmpeg: ffmpeg: Information disclosure via crafted MPEG-4 ALS file
Summary: CVE-2026-125103 ffmpeg: ffmpeg: Information disclosure via crafted MPEG-4 ALS...
Keywords:
Status: NEW
Alias: CVE-2026-125103
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-10 20:14 UTC by OSIDB Bzimport
Modified: 2026-11-10 23:27 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-11-10 20:14:59 UTC 
FFmpeg through 9.0.2 contains an information disclosure vulnerability in ff_mlz_decompression() in libavcodec/mlz.c, which accepts string codes beyond the dictionary's next free code. Attackers can supply a crafted MPEG-4 ALS file with malformed initial or out-of-range codes to copy uninitialized heap bytes into decoded audio output.
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