Bug 2569532 (CVE-2026-125098) - CVE-2026-125098 ffmpeg: ffmpeg: Information disclosure via malformed WebP alpha chunk
Summary: CVE-2026-125098 ffmpeg: ffmpeg: Information disclosure via malformed WebP alp...
Keywords:
Status: NEW
Alias: CVE-2026-125098
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 13:00 UTC by OSIDB Bzimport
Modified: 2026-11-10 13:10 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-11-10 13:00:56 UTC 
FFmpeg through 9.0.2 contains an information disclosure vulnerability in vp8_lossy_decode_alpha() in libavcodec/webp.c that leaves alpha plane memory uninitialized for short uncompressed ALPH chunks. Attackers can supply a crafted WebP image whose ALPH chunk is shorter than width * height to disclose stale pixel data from previously decoded frames.
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