Security advisory

{
  "id": "4fd70a8530efdd00f7a3b9d8747b4a935d0c30c98fd73ccf87882c27529d1794",
  "url": "https://osv.dev/vulnerability/CVE-2021-29579",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29579",
    "summary": "TensorFlow is an end-to-end open source platform for machine learning. The implementation of `tf.raw_ops.MaxPoolGrad` is vulnerable to a heap buffer overflow. The implementation(https://github.com/tensorflow/tensorflow/blob/ab1e644b48c82cb71493f4362b4dd38f4577a1cf/tensorflow/core/kernels/maxpooling_op.cc#L194-L203) fails to validate that indices used to access elements of input/output arrays are valid. Whereas accesses to `input_backprop_flat` are guarded by `FastBoundsCheck`, the indexing in `out_backprop_flat` can result in OOB access. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.",
    "evidence": "osv:CVE-2021-29579",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-29579",
      "aliases": [
        "BIT-tensorflow-2021-29579",
        "CVE-2021-29579",
        "GHSA-79fv-9865-4qcv",
        "PYSEC-2021-216",
        "PYSEC-2021-507",
        "PYSEC-2021-705"
      ],
      "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": "0"
                },
                {
                  "fixed": "0931ea3d985bb9c8fdd054a5e29c4129623c849b"
                },
                {
                  "introduced": "2b96f3662bd776e277f86997659e61046b56c315"
                },
                {
                  "fixed": "cfe0c80169ae984bcdc99ff6de7444164aaa8e07"
                },
                {
                  "introduced": "b36436b087bd8e8701ef51718179037cccdfc26e"
                },
                {
                  "fixed": "3929ffacfbef7c431e8397920d040aaf47acff19"
                },
                {
                  "introduced": "582c8d236cb079023657287c318ff26adb239002"
                },
                {
                  "fixed": "1923123d32ea41d92b70a27a3f6ecf0763b56f6c"
                },
                {
                  "fixed": "a74768f8e4efbda4def9f16ee7e13cf3922ac5f7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.1.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
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                    "range": [
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                        "introduced": "2.2.0"
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                        "fixed": "2.2.3"
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                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
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                    "range": [
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                        "introduced": "2.4.0"
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                      {
                        "fixed": "2.4.2"
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                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
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                        "fixed": "a74768f8e4efbda4def9f16ee7e13cf3922ac5f7"
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                    ],
                    "source": "REFERENCES_COMMIT"
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              }
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          ],
          "versions": [
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            "v2.2.2",
            "v2.3.2",
            "v2.4.1",
            "v2.1.2",
            "v2.2.1",
            "v2.4.0",
            "v2.3.1",
            "v2.2.0",
            "v2.1.1",
            "v2.3.0",
            "v2.1.0",
            "v2.1.0-rc0",
            "v2.1.0-rc2",
            "v2.1.0-rc1",
            "v1.12.1",
            "v1.9.0-rc2",
            "v1.6.0-rc1",
            "v1.1.0-rc2",
            "v1.1.0-rc1",
            "0.6.0",
            "0.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29579.json",
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                "source": "https://github.com/tensorflow/tensorflow/commit/a74768f8e4efbda4def9f16ee7e13cf3922ac5f7",
                "target": {
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            "vanir_signatures_modified": "2026-10-20T14:24:34Z"
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      "modified": "2026-10-20T14:24:34.859702831Z",
      "provider": "osv",
      "references": [
        "https://github.com/tensorflow/tensorflow/commit/a74768f8e4efbda4def9f16ee7e13cf3922ac5f7",
        "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-79fv-9865-4qcv"
      ],
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    "related_cves": [
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388937,
  "published_at": "2021-05-14T20:15:14.247+00:00"
}