{"id":"CVE-2026-64835","summary":"FFmpeg 4.4 - 8.1.2 Out-of-Bounds Memory Access in ADX Audio Decoder","details":"FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder within libavcodec/adxdec.c that allows attackers to trigger both out-of-bounds reads and writes by supplying a crafted ADX or AAX audio file with a mid-stream channel layout change. When AV_PKT_DATA_NEW_EXTRADATA side data is received mid-stream, the adx_decode_frame function re-parses the stream header but fails to update the internal channel state, causing subsequent decoding operations to access the prev[] state array using a stale channel count.","modified":"2026-09-03T18:26:49.930274395Z","published":"2026-07-22T17:24:05.477Z","related":["SUSE-SU-2026:23222-1","SUSE-SU-2026:23232-1","SUSE-SU-2026:3529-1","SUSE-SU-2026:3542-1","openSUSE-SU-2026:11448-1","openSUSE-SU-2026:11665-1","openSUSE-SU-2026:21522-1","openSUSE-SU-2026:21572-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64835.json","unresolved_ranges":[{"extracted_events":[{"introduced":"4.4"},{"last_affected":"8.1.2"},{"introduced":"1836ef96846937a6cc2443698a693104f5c0b21e"},{"last_affected":"1836ef96846937a6cc2443698a693104f5c0b21e"}],"source":"AFFECTED_FIELD"},{"source":"CPE_FIELD","extracted_events":[{"introduced":"4.4"},{"last_affected":"8.1.2"}]},{"source":"DESCRIPTION","extracted_events":[{"introduced":"4.4"},{"fixed":"8.1.2"}]}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-787"]},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64835.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64835"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659"},{"type":"FIX","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.ffmpeg.org/ffmpeg.git","events":[{"introduced":"c5079bf3bccd24bf8ed45ff47ff4071fd09e9fd8"},{"last_affected":"38b88335f99e76ed89ff3c93f877fdefce736c13"}],"database_specific":{"cpe":"cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.4"},{"last_affected":"8.1.2"}],"source":"CPE_RANGE"}}],"versions":["n8.1.2","n8.1.1","n8.1","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"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64835.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/ffmpeg/ffmpeg","events":[{"introduced":"c5079bf3bccd24bf8ed45ff47ff4071fd09e9fd8"},{"last_affected":"38b88335f99e76ed89ff3c93f877fdefce736c13"}],"database_specific":{"cpe":"cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.4"},{"last_affected":"8.1.2"}],"source":"CPE_RANGE"}}],"versions":["n8.1.2","n8.1.1","n8.1","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"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64835.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}