{"id":"CVE-2026-75147","summary":"FFmpeg Out-of-Bounds Read in AV1 RTP Packetizer via rtpenc_av1.c","details":"FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.","modified":"2026-10-08T07:39:16.689929888Z","published":"2026-08-19T16:29:03.399Z","related":["openSUSE-SU-2026:11659-1","openSUSE-SU-2026:11665-1","openSUSE-SU-2026:11682-1"],"database_specific":{"cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75147.json","cna_assigner":"VulnCheck"},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75147.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75147"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-in-av1-rtp-packetizer-via-rtpenc-av1-c"},{"type":"REPORT","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24096"},{"type":"FIX","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/983dae9c19f46c87d597598c0fd2f2fcee0ad2f8"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://code.ffmpeg.org/FFmpeg/FFmpeg","events":[{"introduced":"0"},{"fixed":"983dae9c19f46c87d597598c0fd2f2fcee0ad2f8"}]}],"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":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75147.json","vanir_signatures":[{"target":{"file":"libavformat/rtpenc_av1.c"},"deprecated":false,"digest":{"line_hashes":["275712041044194039918737384177752118465","112030629390621996673565528790491551613","168278039734422158952887987073227306153","7406117684115968516287365129868063248","282232263147983420017211581711086690635"],"threshold":0.9},"id":"CVE-2026-75147-427036ae","signature_type":"Line","signature_version":"v1","source":"https://code.ffmpeg.org/FFmpeg/FFmpeg@983dae9c19f46c87d597598c0fd2f2fcee0ad2f8"},{"deprecated":false,"digest":{"function_hash":"180879282261187805380209169201252525754","length":5569},"id":"CVE-2026-75147-dca06188","signature_type":"Function","signature_version":"v1","source":"https://code.ffmpeg.org/FFmpeg/FFmpeg@983dae9c19f46c87d597598c0fd2f2fcee0ad2f8","target":{"function":"ff_rtp_send_av1","file":"libavformat/rtpenc_av1.c"}}],"vanir_signatures_modified":"2026-10-08T07:39:16Z"}}],"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:N/VA:H/SC:N/SI:N/SA:N"}]}