Bug 2570904 (CVE-2026-125263) - CVE-2026-125263 ffmpeg: FFmpeg: Denial of service via oversized LCEVC video stream dimensions
Summary: CVE-2026-125263 ffmpeg: FFmpeg: Denial of service via oversized LCEVC video s...
Keywords:
Status: NEW
Alias: CVE-2026-125263
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 20:29 UTC by OSIDB Bzimport
Modified: 2026-11-11 00:20 UTC (History)
1 user (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-10 20:29:49 UTC 
FFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized get_buffer2() allocations and exhaust memory.
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