Security advisory

{
  "id": "c85f49d728e35a3ff05a94e948c0c89195eb75cf1ab5014798dc5a80f304b99b",
  "url": "https://osv.dev/vulnerability/CVE-2021-41213",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41213",
    "summary": "TensorFlow is an open source platform for machine learning. In affected versions the code behind `tf.function` API can be made to deadlock when two `tf.function` decorated Python functions are mutually recursive. This occurs due to using a non-reentrant `Lock` Python object. Loading any model which contains mutually recursive functions is vulnerable. An attacker can cause denial of service by causing users to load such models and calling a recursive `tf.function`, although this is not a frequent scenario. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.",
    "evidence": "osv:CVE-2021-41213",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-41213",
      "aliases": [
        "BIT-tensorflow-2021-41213",
        "CVE-2021-41213",
        "GHSA-h67m-xg8f-fxcf",
        "PYSEC-2021-405",
        "PYSEC-2021-622",
        "PYSEC-2021-820"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tensorflow/tensorflow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "582c8d236cb079023657287c318ff26adb239002"
                },
                {
                  "fixed": "64918868e2154b06c7479347a59a4230f785e9fa"
                },
                {
                  "introduced": "a4dfb8d1a71385bd6d122e4f27f86dcebb96712d"
                },
                {
                  "fixed": "957590ea15cc03ee2e00fc61934647d54836676f"
                },
                {
                  "introduced": "919f693420e35d00c8d0a42100837ae3718f7927"
                },
                {
                  "fixed": "3aa40c3ce9d16eae296f086bc4ac4d62deb2affc"
                },
                {
                  "introduced": "ce35e5c3a8efdb8161c6a85c8fb9ffb5bbdc9ffd"
                },
                {
                  "last_affected": "ff68385595088304cf772086b9a259a65b007622"
                },
                {
                  "fixed": "afac8158d43691661ad083f6dd9e56f327c1dcb7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "fixed": "2.4.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5.0"
                      },
                      {
                        "fixed": "2.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.6.0"
                      },
                      {
                        "fixed": "2.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:2.7.0:rc0:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.7.0-rc0"
                      },
                      {
                        "last_affected": "2.7.0-rc0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:2.7.0:rc1:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.7.0-rc1"
                      },
                      {
                        "last_affected": "2.7.0-rc1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "afac8158d43691661ad083f6dd9e56f327c1dcb7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.7.0-rc0",
            "2.7.0-rc1",
            "v2.7.0-rc1",
            "v2.4.3",
            "v2.6.0",
            "v2.5.1",
            "v2.7.0-rc0",
            "v2.4.2",
            "v2.5.0",
            "v2.4.1",
            "v2.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41213.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:57.779947102Z",
      "provider": "osv",
      "references": [
        "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-h67m-xg8f-fxcf",
        "https://github.com/tensorflow/tensorflow/commit/afac8158d43691661ad083f6dd9e56f327c1dcb7"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-41213",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386562,
  "published_at": "2021-11-05T23:15:08.217+00:00"
}