{"id":"CVE-2019-9719","details":"A stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c misuses snprintf. NOTE: Third parties dispute that this is a vulnerability because “no evidence of a vulnerability is provided” and only “a generic warning from a static code analysis” is provided","modified":"2026-04-10T04:20:56.128180Z","published":"2019-09-19T21:15:10.503Z","references":[{"type":"ADVISORY","url":"https://lgtm.com/security/"},{"type":"ADVISORY","url":"https://github.com/libav/libav/commits/master/libavcodec/srtdec.c"},{"type":"EVIDENCE","url":"https://github.com/libav/libav/blob/df744e3cf66548c9167ea857104a29d2ea92819e/libavcodec/srtdec.c#L113"},{"type":"EVIDENCE","url":"https://lgtm.com/projects/g/libav/libav/snapshot/f5f553ca3bdca0c97dd08bbf002f0d8cb193788b/files/libavcodec/srtdec.c?sort=name&dir=ASC&mode=heatmap#xeec693aa6d85853b:1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libav/libav","events":[{"introduced":"0"},{"last_affected":"df744e3cf66548c9167ea857104a29d2ea92819e"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"12.3"}]}}],"versions":["dev14.2","v0.7","v0.7b1","v0.7b2","v0.7rc1","v0.8","v0.8b1","v0.8b2","v10_alpha1","v10_alpha2","v10_beta1","v11_alpha1","v11_alpha2","v11_beta1","v11_dev0","v12","v12.1","v12.3","v12_alpha1","v12_alpha2","v12_beta1","v12_dev0","v9","v9_beta1","v9_beta2","v9_beta3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9719.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}