Security advisory

{
  "id": "0086cbb0e5607967e52e180ade180478d0776a8b2af64b96e76e2dd06613e02e",
  "url": "https://osv.dev/vulnerability/CVE-2021-44647",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-44647",
    "summary": "Lua v5.4.3 and above are affected by SEGV by type confusion in funcnamefromcode function in ldebug.c which can cause a local denial of service.",
    "evidence": "osv:CVE-2021-44647",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-44647",
      "aliases": [
        "BIT-lua-2021-44647",
        "CVE-2021-44647"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/lua/lua",
              "type": "GIT",
              "events": [
                {
                  "introduced": "eadd8c7178c79c814ecca9652973a9b9dd4cc71b"
                },
                {
                  "last_affected": "eadd8c7178c79c814ecca9652973a9b9dd4cc71b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lua:lua:5.4.3:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.4.3"
                      },
                      {
                        "last_affected": "5.4.3"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.4.3",
            "v5.4.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44647.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:56.695216277Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3EMGAQ5Y6GXJLY4K5DUOOEQT4MZ4J4F/",
        "https://access.redhat.com/security/cve/cve-2021-44647",
        "https://security.gentoo.org/glsa/202305-23"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-44647",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438707,
  "published_at": "2022-01-11T13:15:07.833+00:00"
}