{"id":"CVE-2020-21697","details":"A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.","modified":"2026-08-17T04:15:55.205296107Z","published":"2021-08-10T21:15:07.803Z","related":["SUSE-SU-2021:2919-1","SUSE-SU-2021:2929-1","openSUSE-SU-2021:2919-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_STRING","vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"11.0"},{"last_affected":"11.0"}]}]},"references":[{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4998"},{"type":"FIX","url":"https://trac.ffmpeg.org/ticket/8188"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.ffmpeg.org/ffmpeg.git","events":[{"introduced":"517573a67088b5c7a25c18373434e3448892ee93"},{"last_affected":"517573a67088b5c7a25c18373434e3448892ee93"}],"database_specific":{"cpe":"cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*","extracted_events":[{"introduced":"4.2-NA"},{"last_affected":"4.2-NA"}],"source":"CPE_STRING"}}],"versions":["4.2-NA","n4.2-dev"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-21697.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/ffmpeg/ffmpeg","events":[{"introduced":"517573a67088b5c7a25c18373434e3448892ee93"},{"last_affected":"517573a67088b5c7a25c18373434e3448892ee93"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:ffmpeg:ffmpeg:4.2:-:*:*:*:*:*:*","extracted_events":[{"introduced":"4.2-NA"},{"last_affected":"4.2-NA"}]}}],"versions":["4.2-NA","n4.2-dev"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-21697.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}