{"id":"JLSEC-2025-103","summary":"A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU...","details":"A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because `handle_open_brace` in `libavcodec/htmlsubtitles.c` has a complex format argument to sscanf.","modified":"2026-07-25T18:23:34.621387690Z","published":"2025-10-19T19:08:53.760Z","upstream":["CVE-2019-9721"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2019-03-12T09:29:00.577Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2019-9721","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9721","database_specific":{"status":"Modified"},"id":"CVE-2019-9721","imported":"2026-07-17T20:33:08.697Z","modified":"2026-06-17T02:44:13.997Z"}]},"references":[{"type":"WEB","url":"http://www.securityfocus.com/bid/107384"},{"type":"WEB","url":"https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65"},{"type":"WEB","url":"https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774"},{"type":"WEB","url":"https://usn.ubuntu.com/3967-1/"}],"affected":[{"package":{"name":"FFMPEG_jll","ecosystem":"Julia","purl":"pkg:julia/FFMPEG_jll?uuid=b22a6f82-2f65-5046-a5b2-351ab43fb4e5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.3.1+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-103.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V2","score":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}