{"id":"CVE-2026-75141","revision":"6c54c0b32ef34f0893d0a6e9def4a4d5","records":[{"revision":"6c54c0b32ef34f0893d0a6e9def4a4d5","observedAt":"2026-10-27T12:09:21.929+00:00","statement":{"source":"cve-program","id":"CVE-2026-75141","aliases":[],"title":"FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing","description":"FFmpeg before commit acf5d7c contains a heap buffer overflow in the hvcC box writer. When writing an HEVC configuration record with more NAL units of a single type than the count field can represent, the NAL unit count overflows, causing a heap buffer overflow. A crafted HEVC input file triggers the overflow during muxing.","state":0,"publishedAt":"2026-08-19T16:24:01.813+00:00","modifiedAt":"2026-10-27T10:14:29.483+00:00","affected":[{"ecosystem":"Vendor product","name":"FFmpeg","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"FFmpeg\",\n                    \"product\": \"FFmpeg\",\n                    \"repo\": \"https://code.ffmpeg.org/FFmpeg/FFmpeg\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781\",\n                            \"versionType\": \"git\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:github/FFmpeg/FFmpeg\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.5,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24088","https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781","https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-hvcc-box-writer-via-hevc-muxing"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75141","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-75141","identifiers":["CVE-2026-75141"]},"retained":false,"historicalAffected":[]}],"coverage":[]}