CVE-2026-125201

CVSS 7.3 (high) · published 2026-11-09

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.

Weakness: CWE-787

Source: NVD CVE-2026-125201

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24289
• https://github.com/FFmpeg/FFmpeg
• https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/vulkan_av1.c#L578
• https://github.com/FFmpeg/FFmpeg/commit/d29ff884221042af219e53cc339a62356b061816
• https://www.vulncheck.com/advisories/ffmpeg-7.0-before-8.1.3-and-9-x-before-9.0.2-heap-overflow-via-vulkan-av1-c

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