Security advisory

{
  "id": "5475584b8df13cfa782301663bf0c01fa09f2a8650a2812db3cfc7544f01f74f",
  "url": "https://osv.dev/vulnerability/CVE-2021-29512",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29512",
    "summary": "TensorFlow is an end-to-end open source platform for machine learning. If the `splits` argument of `RaggedBincount` does not specify a valid `SparseTensor`(https://www.tensorflow.org/api_docs/python/tf/sparse/SparseTensor), then an attacker can trigger a heap buffer overflow. This will cause a read from outside the bounds of the `splits` tensor buffer in the implementation of the `RaggedBincount` op(https://github.com/tensorflow/tensorflow/blob/8b677d79167799f71c42fd3fa074476e0295413a/tensorflow/core/kernels/bincount_op.cc#L430-L433). Before the `for` loop, `batch_idx` is set to 0. The user controls the `splits` array, making it contain only one element, 0. Thus, the code in the `while` loop would increment `batch_idx` and then try to read `splits(1)`, which is outside of bounds. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2 and TensorFlow 2.3.3, as these are also affected.",
    "evidence": "osv:CVE-2021-29512",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-29512",
      "aliases": [
        "BIT-tensorflow-2021-29512",
        "CVE-2021-29512",
        "GHSA-4278-2v5v-65r4",
        "PYSEC-2021-149",
        "PYSEC-2021-440",
        "PYSEC-2021-638"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tensorflow/tensorflow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b36436b087bd8e8701ef51718179037cccdfc26e"
                },
                {
                  "fixed": "3929ffacfbef7c431e8397920d040aaf47acff19"
                },
                {
                  "introduced": "582c8d236cb079023657287c318ff26adb239002"
                },
                {
                  "fixed": "1923123d32ea41d92b70a27a3f6ecf0763b56f6c"
                },
                {
                  "fixed": "eebb96c2830d48597d055d247c0e9aebaea94cd5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.3.0"
                      },
                      {
                        "fixed": "2.3.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "fixed": "2.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "eebb96c2830d48597d055d247c0e9aebaea94cd5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.3.2",
            "v2.4.1",
            "v2.4.0",
            "v2.3.1",
            "v2.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29512.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-29512-e78c135e",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "50071248545797929442961525939004416823",
                    "313533363499102381398855757400300590347",
                    "34732738541755971658578122202906975538"
                  ]
                },
                "source": "https://github.com/tensorflow/tensorflow/commit/eebb96c2830d48597d055d247c0e9aebaea94cd5",
                "target": {
                  "file": "tensorflow/core/kernels/bincount_op.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:20:34Z"
          }
        }
      ],
      "modified": "2026-10-20T14:20:34.088140722Z",
      "provider": "osv",
      "references": [
        "https://github.com/tensorflow/tensorflow/commit/eebb96c2830d48597d055d247c0e9aebaea94cd5",
        "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-4278-2v5v-65r4"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-29512",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388818,
  "published_at": "2021-05-14T19:15:07.753+00:00"
}