{"id":"CVE-2026-125202","title":"FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VAAPI Tile Arrays","summary":"FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vaapi_hevc_start_frame() in libavcodec/vaapi_hevc.c that copies unbounded PPS tile counts into fixed-size arrays. Attackers can supply a crafted HEVC bitstream with a …","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 <= 9.0.2"],"published":"2026-11-09","updated":"2026-11-09","sourceUpdated":"2026-11-09T19:11:21.451Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-125202","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25136"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vaapi_hevc.c#L221"},{"url":"https://github.com/FFmpeg/FFmpeg"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vaapi-tile-arrays","label":"VulnCheck Advisory: FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VAAPI Tile Arrays"}],"tags":["cve.org"],"ingestedAt":"2026-11-09T19:18:02.599Z","slug":"CVE-2026-125202","body":"## Overview\n\nFFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vaapi_hevc_start_frame() in libavcodec/vaapi_hevc.c that copies unbounded PPS tile counts into fixed-size arrays. Attackers can supply a crafted HEVC bitstream with a large picture and many tiles to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications decoding with VAAPI.\n\n## Affected\n\n- `FFmpeg <= 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":[]}