Bug 2569575 (CVE-2026-125253)

Summary: CVE-2026-125253 ffmpeg: ffmpeg: Denial of Service via integer overflow in VP9 stream parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FFmpeg. An integer overflow vulnerability in the VP9 video stream parsing component allows an attacker to supply a specially crafted VP9 packet with manipulated frame sizes on 32-bit systems. Processing this malformed input bypasses size validation checks and triggers an out-of-bounds memory read, causing the application to crash and resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 13:06:03 UTC 
FFmpeg through 9.0.2 contains an integer overflow in cbs_vp9_split_fragment() in libavcodec/cbs_vp9.c that wraps the superframe size check on 32-bit builds. Attackers can supply a crafted VP9 packet with a forged superframe index containing near-2^32 frame sizes, causing out-of-bounds reads that crash 32-bit applications.