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Security advisory

Type: advisorySources: OSVCVE: CVE-2021-29596

TensorFlow is an end-to-end open source platform for machine learning. The implementation of the `EmbeddingLookup` TFLite operator is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/e4b29809543b250bc9b19678ec4776299dd569ba/tensorflow/lite/kernels/embedding_lookup.cc#L73-L74). An attacker can craft a model such that the first dimension of the `value` input is 0. 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.

Products
Not specified
Affected versions
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Fixed versions
Not specified
CVEs
CVE-2021-29596
Confirmed fixed CVEs
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Updated in this feed
31 Oct 2026, 12:45 UTC · Revision 1

Source evidence

CVE-2021-29596

core-osv · Original source

Published 14 May 2021, 20:15 UTC

TensorFlow is an end-to-end open source platform for machine learning. The implementation of the `EmbeddingLookup` TFLite operator is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/e4b29809543b250bc9b19678ec4776299dd569ba/tensorflow/lite/kernels/embedding_lookup.cc#L73-L74). An attacker can craft a model such that the first dimension of the `value` input is 0. 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.

osv:CVE-2021-29596
Complete source record
{
  "id": "e157a6c3a23b70bf3fee3e22d0c3aa0b2a50e82e2e80154582120507c652778e",
  "url": "https://osv.dev/vulnerability/CVE-2021-29596",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29596",
    "summary": "TensorFlow is an end-to-end open source platform for machine learning. The implementation of the `EmbeddingLookup` TFLite operator is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/e4b29809543b250bc9b19678ec4776299dd569ba/tensorflow/lite/kernels/embedding_lookup.cc#L73-L74). An attacker can craft a model such that the first dimension of the `value` input is 0. 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-2021-29596",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-29596",
      "aliases": [
        "BIT-tensorflow-2021-29596",
        "CVE-2021-29596",
        "GHSA-4vrf-ff7v-hpgr",
        "PYSEC-2021-233",
        "PYSEC-2021-524",
        "PYSEC-2021-722"
      ],
      "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": [
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              "events": [
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                  "introduced": "0"
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                {
                  "fixed": "0931ea3d985bb9c8fdd054a5e29c4129623c849b"
                },
                {
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                {
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                {
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                },
                {
                  "fixed": "1923123d32ea41d92b70a27a3f6ecf0763b56f6c"
                },
                {
                  "fixed": "f61c57bd425878be108ec787f4d96390579fb83e"
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              ],
              "database_specific": {
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                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
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                    ],
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                    "cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
                    "range": [
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                    "source": "CPE_RANGE"
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                    "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": [
                      {
                        "fixed": "f61c57bd425878be108ec787f4d96390579fb83e"
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                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "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",
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            "0.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29596.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-29596-27edbd85",
                "digest": {
                  "length": 748,
                  "function_hash": "149913468815747346666472510062383376108"
                },
                "source": "https://github.com/tensorflow/tensorflow/commit/f61c57bd425878be108ec787f4d96390579fb83e",
                "target": {
                  "file": "tensorflow/lite/kernels/embedding_lookup.cc",
                  "function": "EvalSimple"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-29596-4de58ad9",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                },
                "source": "https://github.com/tensorflow/tensorflow/commit/f61c57bd425878be108ec787f4d96390579fb83e",
                "target": {
                  "file": "tensorflow/lite/kernels/embedding_lookup.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
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            ],
            "vanir_signatures_modified": "2026-10-20T14:24:43Z"
          }
        }
      ],
      "modified": "2026-10-20T14:24:43.858506475Z",
      "provider": "osv",
      "references": [
        "https://github.com/tensorflow/tensorflow/commit/f61c57bd425878be108ec787f4d96390579fb83e",
        "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-4vrf-ff7v-hpgr"
      ],
      "provider_metadata": {}
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    "related_cves": [
      {
        "value": "CVE-2021-29596",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388960,
  "published_at": "2021-05-14T20:15:15.257+00:00"
}