Bug 2570040 (CVE-2026-125196)

Summary: CVE-2026-125196 ffmpeg: ffmpeg: Heap-based buffer overflow via mid-stream resolution changes
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 attacker could exploit this vulnerability to cause memory corruption, potentially leading to arbitrary code execution or a Denial of Service (DoS). When transcoding video streams that change resolution mid-stream without rescaling, the APV (Advanced Professional Video) encoder wrapper processes frames larger than the configured dimensions, triggering a heap-based buffer overflow.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:32:30 UTC
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in liboapve_encode() in libavcodec/liboapvenc.c that allows attackers to corrupt heap memory by supplying frames larger than the configured encoder dimensions. Attackers can craft videos whose resolution changes mid-stream so that transcoding to APV without rescaling writes attacker-controlled pixel data past the imgb plane buffers.