{"id":"CVE-2026-75141","summary":"FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing","details":"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.","modified":"2026-10-08T07:39:18.054871478Z","published":"2026-08-19T16:24:01.813Z","related":["openSUSE-SU-2026:11659-1","openSUSE-SU-2026:11665-1","openSUSE-SU-2026:11682-1","openSUSE-SU-2026:12064-1","openSUSE-SU-2026:21877-1"],"database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75141.json"},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75141.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75141"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-hvcc-box-writer-via-hevc-muxing"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24088"},{"type":"FIX","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://code.ffmpeg.org/FFmpeg/FFmpeg","events":[{"introduced":"0"},{"fixed":"acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781"}]}],"versions":["n9.1-dev","n8.2-dev","n8.1-dev","n7.2-dev","n7.1-dev","n6.2-dev","n6.1-dev","n5.2-dev","n5.1-dev","n4.5-dev","n4.4-dev","n4.3-dev","n4.2-dev","n4.1-dev","n3.5-dev","n3.4-dev","n3.3-dev","n3.2-dev","n3.1-dev","n2.9-dev","n2.8-dev","n2.7-dev","n2.6-dev","n2.5-dev","n2.4-dev","n2.3-dev","n2.2-dev","n2.0","n2.1-dev","n1.3-dev","n1.2-dev","n1.1-dev","n0.12-dev","n0.11-dev","n0.8","N"],"database_specific":{"vanir_signatures":[{"id":"CVE-2026-75141-521eb75b","signature_type":"Line","signature_version":"v1","source":"https://code.ffmpeg.org/FFmpeg/FFmpeg@acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781","target":{"file":"libavformat/hevc.c"},"deprecated":false,"digest":{"line_hashes":["171120489460269271572944630595405024716","228269754873946655632573446782989375232","147548849313941577437332154418106305823"],"threshold":0.9}},{"deprecated":false,"digest":{"function_hash":"300450159533624974693068667980417737242","length":350},"id":"CVE-2026-75141-9059cfe7","signature_type":"Function","signature_version":"v1","source":"https://code.ffmpeg.org/FFmpeg/FFmpeg@acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781","target":{"function":"hvcc_array_add_nal_unit","file":"libavformat/hevc.c"}}],"vanir_signatures_modified":"2026-10-08T07:39:18Z","source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75141.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}