Bug 2570293 (CVE-2026-125219)

Summary: CVE-2026-125219 ffmpeg: ffmpeg: Arbitrary code execution via heap-based buffer overflow in HEVC VDPAU decoding
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 providing a specially crafted High Efficiency Video Coding (HEVC) video stream that triggers a heap-based buffer overflow when using Video Decode and Presentation API for Unix (VDPAU) hardware acceleration. Successful exploitation could lead to arbitrary code execution or an application crash resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-10 19:48:46 UTC
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vdpau_hevc_start_frame() in libavcodec/vdpau_hevc.c that copies unbounded PPS tile counts into fixed-size VDPAU arrays. Attackers can supply crafted HEVC bitstreams with excessive tile columns or rows to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications using VDPAU decoding.