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FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.","status":"published","published":"2019-03-12T06:00:00Z","modified":"2024-08-04T22:01:53.269Z","updated_at":"2026-11-02T14:20:20.397093Z"}],"euvd":[{"id":"EUVD-2019-19083","description":"In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.","status":"published","published":"2019-03-12T06:00:00Z","modified":"2024-08-04T22:01:53Z","updated_at":"2026-11-03T03:06:37.634716Z"}],"ghsa":[{"id":"GHSA-423p-f8g4-wmpc","title":"In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the...","description":"In FFmpeg 3.2 and 4.1, a denial 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because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.","status":"published","published":"2019-03-12T09:29:00.53Z","modified":"2026-09-21T07:03:26.823456074Z","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":"2026-11-02T15:45:32.57265Z"},{"id":"JLSEC-2025-102","title":"In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU...","description":"In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because `ff_htmlmarkup_to_ass` in `libavcodec/htmlsubtitles.c` has a complex format argument to 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decode (bsc#1129715).\n- CVE-2018-13301: Fixed a denial of service while converting a crafted AVI file \n  to MPEG4 (bsc#1100352).\n  ","status":"published","published":"2019-12-05T10:44:14Z","modified":"2026-02-04T04:16:22.814102Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2019:3184-2","title":"Security update for ffmpeg","description":"This update for ffmpeg fixes the following issues:\n\nSecurity issues fixed:\t  \n- CVE-2019-17542: Fixed a heap-buffer overflow in vqa_decode_chunk due to an \n  out-of-array access (bsc#1154064).\n- CVE-2019-12730: Fixed an uninitialized use of variables due to an improper \n  check (bsc#1137526).\n- CVE-2019-9718: Fixed a denial of service in the subtitle decode (bsc#1129715).\n- CVE-2018-13301: Fixed a denial of service while converting a crafted AVI file \n  to MPEG4 (bsc#1100352).\n  ","status":"published","published":"2020-07-07T11:43:16Z","modified":"2025-05-02T04:07:43.68635Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"USN-3967-1","title":"FFmpeg vulnerabilities","description":"It was discovered that FFmpeg contained multiple security issues when handling\ncertain multimedia files. If a user were tricked into opening a crafted\nmultimedia file, an attacker could cause a denial of service via application\ncrash.\n","status":"published","published":"2019-05-06T17:24:53Z","modified":"2026-04-22T09:56:06.140426Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}