Security advisory

{
  "id": "1f525622cd5fdb4dadc0ffb33e45fc3631b46173f96949264f67df61016a742b",
  "url": "https://osv.dev/vulnerability/CVE-2021-44964",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-44964",
    "summary": "Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.",
    "evidence": "osv:CVE-2021-44964",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-44964",
      "aliases": [
        "BIT-lua-2021-44964",
        "CVE-2021-44964"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/lua/lua",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c33b1728aeb7dfeec4013562660e07d32697aa6b"
                },
                {
                  "last_affected": "eadd8c7178c79c814ecca9652973a9b9dd4cc71b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.4.0"
                      },
                      {
                        "last_affected": "5.4.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.4.3",
            "v5.4.2",
            "v5.4.1",
            "v5.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44964.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:05.488396455Z",
      "provider": "osv",
      "references": [
        "https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-44964",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 440777,
  "published_at": "2022-03-14T15:15:09.373+00:00"
}