Bug 2570189 (CVE-2026-125201)

Summary: CVE-2026-125201 ffmpeg: ffmpeg: Arbitrary code execution via crafted AV1 video stream
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 AV1 video file containing an excessive number of tiles to be decoded using Vulkan hardware acceleration. Because the decoder does not properly enforce tile limits during processing, this triggers a heap-based buffer overflow that corrupts application memory. Successful exploitation may allow arbitrary code execution or cause an application crash, resulting in a denial of service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:42:09 UTC 
FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 contains a heap out-of-bounds write vulnerability in vk_av1_decode_slice() in libavcodec/vulkan_av1.c because the tile-count limit is checked only on entry. Attackers can supply a crafted AV1 stream with more than 256 tiles decoded via the Vulkan hardware accelerator to overflow tile_sizes and corrupt heap memory.