Security advisory

{
  "id": "69f5cf40eb5612586191b519b5f343f3ab1a9df4c45d2ef327dcbd161a244daf",
  "url": "https://osv.dev/vulnerability/CVE-2018-6548",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-6548",
    "summary": "A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.",
    "evidence": "osv:CVE-2018-6548",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-6548",
      "aliases": [
        "CVE-2018-6548"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/webmproject/libwebm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "82ac5fcdc8525820442faa90847b452113fc9394"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:webmproject:libwebm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.0.27"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "libwebm-1.0.0.27",
            "libwebm-1.0.0.26",
            "libwebm-1.0.0.25",
            "libwebm-1.0.0.24",
            "libwebm-1.0.0.23",
            "libwebm-1.0.0.22",
            "libwebm-1.0.0.21",
            "libwebm-1.0.0.20",
            "libwebm-1.0.0.19",
            "libwebm-1.0.0.18",
            "libwebm-1.0.0.17",
            "libwebm-1.0.0.16",
            "libwebm-1.0.0.15",
            "libwebm-1.0.0.14",
            "libwebm-1.0.0.13",
            "libwebm-1.0.0.12",
            "libwebm-1.0.0.11",
            "libwebm-1.0.0.10",
            "libwebm-1.0.0.9",
            "libwebm-1.0.0.8",
            "libwebm-1.0.0.7",
            "libwebm-1.0.0.6",
            "libwebm-1.0.0.5",
            "libwebm-1.0.0.4",
            "libwebm-1.0.0.3",
            "libwebm-1.0.0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6548.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.283884384Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/webm/issues/detail?id=1493",
        "https://github.com/dwfault/PoCs/blob/master/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info.md"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-6548",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431324,
  "published_at": "2018-02-02T09:29:00.85+00:00"
}