{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2018-01-30"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2018-01-30"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through 2018-01-30 does not validate the child_frame_length data obtained from a .webm file, which allows remote attackers to cause an information leak or a denial of service (heap-based buffer over-read and later out-of-bounds write), or possibly have unspecified other impact.",
  "id": "CVE-2018-6406",
  "modified": "2026-03-13T21:48:16.007354492Z",
  "published": "2018-01-30T21:29:00.400Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dwfault/PoCs/blob/master/libwebm%20ParseVP9SuperFrameIndex%20memory%20corruption/libwebm%20ParseVP9SuperFrameIndex%20OOB%20read.md"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/webm/issues/detail?id=1492"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}