{"id":"CVE-2026-125201","title":"FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 Heap Overflow via vulkan_av1.c","summary":"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 …","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"FFmpeg","product":"FFmpeg","affected":["FFmpeg >= 7.0 < 8.1.3","FFmpeg >= 9.0 < 9.0.2"],"published":"2026-11-09","updated":"2026-11-09","sourceUpdated":"2026-11-09T19:11:20.789Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-125201","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24289"},{"url":"https://github.com/FFmpeg/FFmpeg/commit/d29ff884221042af219e53cc339a62356b061816","label":"Patch Commit"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/vulkan_av1.c#L578"},{"url":"https://github.com/FFmpeg/FFmpeg"},{"url":"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","label":"VulnCheck Advisory: FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 Heap Overflow via vulkan_av1.c"}],"tags":["cve.org"],"ingestedAt":"2026-11-09T19:18:02.600Z","slug":"CVE-2026-125201","body":"## Overview\n\nFFmpeg 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.\n\n## Affected\n\n- `FFmpeg >= 7.0 < 8.1.3`\n- `FFmpeg >= 9.0 < 9.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}