Security advisory

{
  "id": "516b07b646b6243ce9de5f7645cd37a63c4b9dcad237c55c79f71f9fc01e9eff",
  "url": "https://osv.dev/vulnerability/CVE-2018-18827",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-18827",
    "summary": "There exists a heap-based buffer over-read in ff_vc1_pred_dc in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.",
    "evidence": "osv:CVE-2018-18827",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-18827",
      "aliases": [
        "CVE-2018-18827"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libav/libav",
              "type": "GIT",
              "events": [
                {
                  "introduced": "df744e3cf66548c9167ea857104a29d2ea92819e"
                },
                {
                  "last_affected": "df744e3cf66548c9167ea857104a29d2ea92819e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libav:libav:12.3:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "12.3"
                      },
                      {
                        "last_affected": "12.3"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "12.3",
            "v12.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18827.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.949294518Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.libav.org/show_bug.cgi?id=1135"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-18827",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431490,
  "published_at": "2018-10-30T06:29:00.577+00:00"
}