High severity7.0NVD Advisory· Published Nov 9, 2026

CVE-2026-125201

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

FFmpeg/Ffmpegllm-fuzzy
Range: 7.0 before 8.1.3 and 9.x before 9.0.2

Patches

Vulnerability mechanics

References

code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24289nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/vulkan_av1.cnvd
github.com/FFmpeg/FFmpeg/commit/d29ff884221042af219e53cc339a62356b061816nvd
www.vulncheck.com/advisories/ffmpeg-7.0-before-8.1.3-and-9-x-before-9.0.2-heap-overflow-via-vulkan-av1-cnvd

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cvss	0.455
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000