Security advisory

{
  "id": "b9eb308635de2a72aa9480970dfaf2174bc085520b1c5d26e7690294a0567d6a",
  "url": "https://osv.dev/vulnerability/CVE-2018-20991",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20991",
    "summary": "An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.",
    "evidence": "osv:CVE-2018-20991",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-20991",
      "aliases": [
        "CVE-2018-20991",
        "GHSA-rxr4-x558-x7hw",
        "RUSTSEC-2018-0003"
      ],
      "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/servo/rust-smallvec",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ce94fc6777d79c0361d78cde4eb1efbc66405b2d"
                },
                {
                  "fixed": "fcb1b7e99a2a98d928983af78a494ef566cbde8b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:servo:smallvec:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.3.2"
                      },
                      {
                        "fixed": "0.6.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.3.3",
            "v0.5.0",
            "v0.4.4",
            "v0.6.1",
            "v0.6.0",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20991.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:20.798906315Z",
      "provider": "osv",
      "references": [
        "https://rustsec.org/advisories/RUSTSEC-2018-0003.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20991",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430341,
  "published_at": "2019-08-26T15:15:11.39+00:00"
}