Security advisory

{
  "id": "eacdf6934007a28a253d48e916c3ff8429f516a1ec6b12b2732414ccca14948a",
  "url": "https://osv.dev/vulnerability/CVE-2021-32495",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32495",
    "summary": "Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory afterwards. This will allow attackers to cause denial of service.",
    "evidence": "osv:CVE-2021-32495",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-32495",
      "aliases": [
        "CVE-2021-32495"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/radareorg/radare2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ee753c25094c6e1c62dfb9596423824251dbc943"
                },
                {
                  "last_affected": "ee753c25094c6e1c62dfb9596423824251dbc943"
                },
                {
                  "fixed": "5e16e2d1c9fe245e4c17005d779fde91ec0b9c05"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:radare:radare2:5.3.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.3.0"
                      },
                      {
                        "last_affected": "5.3.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5e16e2d1c9fe245e4c17005d779fde91ec0b9c05"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32495.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-32495-89e7b878",
                "digest": {
                  "length": 228,
                  "function_hash": "281144442903635776283408469084151380870"
                },
                "source": "https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05",
                "target": {
                  "file": "libr/bin/format/pyc/marshal.c",
                  "function": "get_none_object"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-32495-e60a11fd",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                },
                "source": "https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05",
                "target": {
                  "file": "libr/bin/format/pyc/marshal.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-32495-f6dc3e9a",
                "digest": {
                  "length": 2432,
                  "function_hash": "152887779541464158850990740854948468430"
                },
                "source": "https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05",
                "target": {
                  "file": "libr/bin/format/pyc/marshal.c",
                  "function": "get_object"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:23:46Z"
          }
        }
      ],
      "modified": "2026-10-20T14:23:46.096290174Z",
      "provider": "osv",
      "references": [
        "https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05",
        "https://github.com/radareorg/radare2/issues/18666"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-32495",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388890,
  "published_at": "2023-07-07T19:15:09.6+00:00"
}