{"id":"CVE-2021-30123","aliases":["ALPINE-CVE-2021-30123","EUVD-2021-17063","GHSA-gx3h-4rx7-q328","JLSEC-2025-112"],"status":"published","title":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that...","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.03431,"percentile":0.89101,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2021-04-07T19:16:02Z","modified":"2026-11-06T10:46:23Z","fixes":[{"ecosystem":"Alpine:v3.14","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"ffmpeg","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"ffmpeg4","fixed_in":["4.4-r0"],"sources":["osv"]},{"ecosystem":"Julia","package":"FFMPEG_jll","fixed_in":["4.4.2+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.14","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"ffmpeg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"ffmpeg4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4-r0"}]}]},{"source":"osv","ecosystem":"Julia","package":"FFMPEG_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"4.4.0+0"},{"fixed":"4.4.2+0"}]}]}],"products":[{"vendor":"ffmpeg","product":"ffmpeg"}],"references":[{"url":"https://trac.ffmpeg.org/ticket/8845","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory","evidence","web"]},{"url":"http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=d6f293353c94c7ce200f6e0975ae3de49787f91f","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://trac.ffmpeg.org/ticket/8863","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory","evidence","web"]},{"url":"https://security.gentoo.org/glsa/202105-24","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30123"},{"url":"http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=d6f293353c94c7ce200f6e0975ae3de49787f91f"},{"url":"https://github.com/advisories/GHSA-gx3h-4rx7-q328"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-30123","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-30123","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2021-04-07T19:16:02Z","modified":"2024-08-03T22:24:59.335Z","updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2021-17063","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2021-04-07T19:16:02Z","modified":"2024-08-03T22:24:59Z","updated_at":"2026-11-03T03:24:42.963555Z"}],"ghsa":[{"id":"GHSA-gx3h-4rx7-q328","title":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that...","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2022-05-24T17:46:48Z","modified":"2023-01-29T05:06:17Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:45:59.496932Z"}],"nvd":[{"id":"CVE-2021-30123","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2021-04-07T20:15:13.403Z","modified":"2026-06-17T03:49:42.42Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:51.610648Z"}],"osv":[{"id":"ALPINE-CVE-2021-30123","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2021-04-07T20:15:13.403Z","modified":"2026-11-03T06:32:47.048204678Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T07:16:46.202932Z"},{"id":"CVE-2021-30123","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2021-04-07T20:15:13.403Z","modified":"2026-11-07T10:47:10.441081642Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-07T11:15:38.581573Z"},{"id":"JLSEC-2025-112","title":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may...","description":"FFmpeg \u003c=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.","status":"published","published":"2025-10-19T19:08:53.76Z","modified":"2026-07-23T22:30:06.225371227Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:47:17.805107Z"}]}}