{"id":"CVE-2019-9717","aliases":["EUVD-2019-19082","GHSA-g8wg-jvvh-f2j6","UBUNTU-CVE-2019-9717"],"status":"published","title":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a...","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01276,"percentile":0.70151,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-400"],"published":"2019-09-19T20:28:19Z","modified":"2026-10-20T10:50:57Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-1","1.6.0-2","1.6.1-1","1.6.2-1","1.7.1-1","1.7.2-1","1.7.90-1","1.8.0-1","1.8.1-1~ubuntu1","1.8.2-1~ubuntu1","1.8.3-1ubuntu0.1","1.8.3-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.2-1","1.12.3-1","1.12.4-1","1.13.91-1","1.14.0-1","1.14.1-1~ubuntu18.04.1","1.14.4-0ubuntu1~ubuntu18.04.1","1.14.5-0ubuntu1~18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.9.1+dfsg-4","5.9.1+dfsg-4ubuntu1","5.9.2+dfsg-2ubuntu1","5.9.3+dfsg-0ubuntu1","5.9.4+dfsg-0ubuntu1","5.9.5+dfsg-0ubuntu2","5.9.5+dfsg-0ubuntu2+esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.1-1","1.16.2-1","1.16.2-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.12.4+dfsg-1ubuntu1","5.12.4+dfsg-1ubuntu3","5.12.5+dfsg-3ubuntu1","5.12.5+dfsg-6ubuntu2","5.12.5+dfsg-7","5.12.5+dfsg-7build1","5.12.8+dfsg-0ubuntu1","5.12.8+dfsg-0ubuntu1.1","5.12.8+dfsg-0ubuntu1.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.5-1","1.20.0-1","1.20.1-1","1.20.3-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.6+dfsg-1","5.15.6+dfsg-2","5.15.7+dfsg-2","5.15.8+dfsg-1","5.15.8+dfsg-1build1","5.15.8+dfsg-1build2","5.15.8+dfsg-2","5.15.9+dfsg-1","5.15.9+dfsg-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.22.5-1","1.22.6-1","1.22.7-1","1.22.8-1","1.22.10-1","1.24.1-1","1.24.1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.15+dfsg-2","5.15.15+dfsg-2build2","5.15.15+dfsg-2ubuntu1","5.15.16+dfsg-1","5.15.16+dfsg-1ubuntu2","5.15.16+dfsg-1ubuntu4","5.15.16+dfsg-3","5.15.16+dfsg-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0-1","1.26.1-1","1.26.2-1","1.26.3-1","1.26.4-1","1.26.5-1","1.26.6-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.18+dfsg-2","5.15.18+dfsg-2build1","5.15.19+dfsg-1","5.15.19+dfsg2-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.28.2-1","1.28.3-1","1.28.4-1build1","1.28.5-1","1.28.6-1","1.28.7-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.19+dfsg2-4","5.15.19+dfsg2-6","5.15.19+dfsg2-7"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"gst-libav1.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.6-1","1.27.2-1","1.27.2-1build1","1.27.90-1","1.28.0-1","1.28.1-1","1.28.2-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"qtwebengine-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.15.19+dfsg2-1","5.15.19+dfsg2-1build1","5.15.19+dfsg2-2","5.15.19+dfsg2-3","5.15.19+dfsg2-4","5.15.19+dfsg2-4ubuntu0.1~esm1"]}],"products":[{"vendor":"libav","product":"libav"}],"references":[{"url":"https://github.com/libav/libav/blob/df744e3cf66548c9167ea857104a29d2ea92819e/libavcodec/srtdec.c#L90","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://lgtm.com/security/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9717"},{"url":"https://github.com/advisories/GHSA-g8wg-jvvh-f2j6"},{"url":"https://ubuntu.com/security/CVE-2019-9717","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-9717","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-9717","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2019-09-19T20:28:19Z","modified":"2024-08-04T22:01:53.259Z","updated_at":"2026-11-02T14:20:20.081405Z"}],"euvd":[{"id":"EUVD-2019-19082","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2019-09-19T20:28:19Z","modified":"2024-08-04T22:01:53Z","updated_at":"2026-11-03T03:06:37.634716Z"}],"ghsa":[{"id":"GHSA-g8wg-jvvh-f2j6","title":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a...","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2022-05-24T16:56:31Z","modified":"2023-01-28T05:07:34Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:44:32.600172Z"}],"nvd":[{"id":"CVE-2019-9717","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2019-09-19T21:15:10.44Z","modified":"2026-06-17T02:44:13.523Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:05:28.126831Z"}],"osv":[{"id":"CVE-2019-9717","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2019-09-19T21:15:10.44Z","modified":"2026-10-20T10:50:57.190661544Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:12.974481Z"},{"id":"UBUNTU-CVE-2019-9717","description":"In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c has a complex format argument to sscanf.","status":"published","published":"2019-09-19T21:15:00Z","modified":"2026-10-17T12:56:11.054385056Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:22.212782Z"}]}}