Bug 2570604 (CVE-2026-125254)

Summary: CVE-2026-125254 ffmpeg: ffmpeg: Denial of Service via division by zero in VVC 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. A division-by-zero vulnerability in the Versatile Video Coding (VVC) decoder allows an attacker to cause a Denial of Service (DoS) by supplying a specially crafted video stream. Because active reference indices are not properly validated against reference list entries during decoding, processing the malformed bitstream triggers an arithmetic error that crashes the application.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-10 20:09:56 UTC
FFmpeg through 9.0.2 contains a division by zero vulnerability in the VVC decoder because ff_vvc_slice_rpl() fails to validate num_ref_idx_active against built reference list entries. Attackers can supply a crafted VVC bitstream whose excess reference indices yield a zero POC difference in ff_vvc_mv_scale(), crashing the decoding process.