Security advisory

{
  "id": "0300ef9d4780cfd73f6739abbcbc3aca6300a3fc21f6b585f1abf6379b06af96",
  "url": "https://osv.dev/vulnerability/CVE-2020-27793",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-27793",
    "summary": "An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.",
    "evidence": "osv:CVE-2020-27793",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-27793",
      "aliases": [
        "CVE-2020-27793"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/radareorg/radare2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9ea0b7ce566cfdcfb3513f407c4056915204294a"
                },
                {
                  "fixed": "ced0223c7a1b3b5344af315715cd28fe7c0d9ebc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:radare:radare2:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ced0223c7a1b3b5344af315715cd28fe7c0d9ebc"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.3.1",
            "Continuous-Windows",
            "4.3.0",
            "continuous",
            "4.2.1",
            "4.2.0",
            "4.1.1",
            "4.1.0",
            "4.0.0",
            "3.9.0",
            "3.8.0",
            "3.7.1",
            "3.7.0",
            "3.6.0",
            "3.5.1",
            "3.5.0",
            "3.4.1",
            "3.4.0",
            "3.3.0",
            "3.2.1",
            "3.2.0",
            "3.1.3",
            "3.1.2",
            "3.1.1",
            "3.1.0",
            "3.0.1",
            "3.0.0",
            "2.9.0",
            "2.8.0",
            "2.7.0",
            "2.6.9",
            "2.6.0",
            "2.5.0",
            "2.4.0",
            "2.2.0",
            "2.1.0",
            "2.0.1",
            "2.0.0",
            "1.6.0",
            "1.5.0",
            "1.4.0",
            "1.3.0",
            "1.3.0-git",
            "1.2.0",
            "1.2.0-git",
            "1.1.0",
            "1.0.2",
            "1.0.1",
            "1.0.0",
            "1.0",
            "0.10.6",
            "0.10.5",
            "0.10.4-termux4",
            "termux",
            "0.10.4",
            "0.10.3",
            "0.10.2",
            "0.10.1",
            "0.10.0",
            "radare2-windows-nightly",
            "0.9.9",
            "0.9.8",
            "0.9.8-rc4",
            "0.9.8-rc3",
            "0.9.8-rc2",
            "0.9.8-rc1",
            "0.9.7",
            "0.9.6",
            "0.9.4",
            "0.9.2",
            "0.9",
            "0.8.8",
            "0.8.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27793.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-27793-4f2b678a",
                "digest": {
                  "length": 19258,
                  "function_hash": "244292947791401580523619951343614918559"
                },
                "source": "https://github.com/radareorg/radare2/commit/9ea0b7ce566cfdcfb3513f407c4056915204294a",
                "target": {
                  "file": "libr/anal/fcn.c",
                  "function": "fcn_recurse"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-27793-93100de4",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                    "33443597288417089084816862781691635747",
                    "274718893259183668102575589565194103045"
                  ]
                },
                "source": "https://github.com/radareorg/radare2/commit/9ea0b7ce566cfdcfb3513f407c4056915204294a",
                "target": {
                  "file": "libr/anal/fcn.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-27793-b92a97b1",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                    "24753110438177061253684813837281270178",
                    "182537489851628075162603501473392459654"
                  ]
                },
                "source": "https://github.com/radareorg/radare2/commit/ced0223c7a1b3b5344af315715cd28fe7c0d9ebc",
                "target": {
                  "file": "libr/core/p/core_java.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-27793-e05ad92b",
                "digest": {
                  "length": 767,
                  "function_hash": "281549250108404963213448806190067423306"
                },
                "source": "https://github.com/radareorg/radare2/commit/ced0223c7a1b3b5344af315715cd28fe7c0d9ebc",
                "target": {
                  "file": "libr/core/p/core_java.c",
                  "function": "r_cmd_java_call"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:59:25Z"
          }
        }
      ],
      "modified": "2026-10-20T13:59:25.017534747Z",
      "provider": "osv",
      "references": [
        "https://github.com/radareorg/radare2/commit/ced0223c7a1b3b5344af315715cd28fe7c0d9ebc",
        "https://github.com/radareorg/radare2/issues/16304"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-27793",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388483,
  "published_at": "2022-08-19T23:15:08.367+00:00"
}