Bug 2569852 (CVE-2026-125223)

Summary: CVE-2026-125223 ffmpeg: ffmpeg: Denial of Service via memory leak in VP9 decoder
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. This vulnerability allows an attacker to cause a Denial of Service (DoS) by exhausting system memory through a memory leak in the VP9 video decoder. When processing a crafted VP9 stream containing invalid tile sizes, the decoding routine fails to release allocated memory buffers on error paths. Continuous processing of such malformed streams can deplete available memory and lead to application instability or crashes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:19:14 UTC
FFmpeg 8.0 through 9.0.2 contains a memory leak vulnerability in the VP9 decoder that allows attackers to exhaust memory because vp9_decode_frame() skips resetting the CBS fragment on error paths. Attackers can supply a crafted VP9 stream with invalid tile sizes decoded with slice threading to leak packet buffers and units, exhausting memory in the decoding application.