Bug 2570225 (CVE-2026-125239)

Summary: CVE-2026-125239 ffmpeg: FFmpeg: Arbitrary code execution via crafted HEVC video streams
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 by supplying a specially crafted High Efficiency Video Coding (HEVC) video stream containing an excessive number of tile parameters during hardware-accelerated decoding. This issue leads to a heap-based buffer overflow, which can result in memory corruption, arbitrary code execution, or an application crash causing a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-10 19:44:20 UTC
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in ff_dxva2_hevc_fill_picture_parameters() that allows attackers to corrupt memory via unbounded non-uniform tile counts. Attackers can supply crafted HEVC bitstreams with many non-uniformly spaced tiles to write controlled 16-bit values past fixed-size DXVA arrays during DXVA2, D3D11VA, or D3D12VA decoding on Windows.