Security advisory

{
  "id": "d5c02f46349ef62bd851ef7904a1da0ad186184aa9b85e3a9fbdf8900301ce2b",
  "url": "https://osv.dev/vulnerability/CVE-2020-18974",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-18974",
    "summary": "Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.",
    "evidence": "osv:CVE-2020-18974",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2020-18974",
      "aliases": [
        "CVE-2020-18974"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/netwide-assembler/nasm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a825b33423d5046dfc4c0992c3ebfea5b8a531c4"
                },
                {
                  "last_affected": "214f2d4c56925a280c480950bbf71389e2169e1a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.15"
                      },
                      {
                        "last_affected": "2.15.05"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "nasm-2.15.05",
            "nasm-2.15.05rc2",
            "nasm-2.15.05rc1",
            "nasm-2.15.04",
            "nasm-2.15.04rc6",
            "nasm-2.15.04rc5",
            "nasm-2.15.04rc4",
            "nasm-2.15.04rc3",
            "nasm-2.15.04rc2",
            "nasm-2.15.04rc1",
            "nasm-2.15.03",
            "nasm-2.15.03rc8",
            "nasm-2.15.03rc7",
            "nasm-2.15.03rc6",
            "nasm-2.15.03rc5",
            "nasm-2.15.03rc4",
            "nasm-2.15.03rc3",
            "nasm-2.15.03rc2",
            "nasm-2.15.03rc1",
            "nasm-2.15.02",
            "nasm-2.15.02rc2",
            "nasm-2.15.02rc1",
            "nasm-2.15.01",
            "nasm-2.15"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-18974.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:40.511432240Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.nasm.us/show_bug.cgi?id=3392568"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-18974",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 434941,
  "published_at": "2021-08-25T16:15:08.567+00:00"
}