{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "12.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "df744e3cf66548c9167ea857104a29d2ea92819e"
            }
          ],
          "repo": "https://github.com/libav/libav",
          "type": "GIT"
        }
      ]
    }
  ],
  "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",
  "id": "CVE-2019-9719",
  "modified": "2026-04-01T23:09:23.266977641Z",
  "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\u0026dir=ASC\u0026mode=heatmap#xeec693aa6d85853b:1"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}