Security advisory
TensorFlow is an end-to-end open source platform for machine learning. The TFLite implementation of hashtable lookup is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/1a8e885b864c818198a5b2c0cbbeca5a1e833bc8/tensorflow/lite/kernels/hashtable_lookup.cc#L114-L115) An attacker can craft a model such that `values`'s first dimension would be 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
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-29604
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:44 UTC · Revision 1
Source evidence
TensorFlow is an end-to-end open source platform for machine learning. The TFLite implementation of hashtable lookup is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/1a8e885b864c818198a5b2c0cbbeca5a1e833bc8/tensorflow/lite/kernels/hashtable_lookup.cc#L114-L115) An attacker can craft a model such that `values`'s first dimension would be 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-2021-29604
Complete source record
{
"id": "e14482c2058422136de00c26fefed88ec8e29db43be97e5c22cfc31bf5c2617c",
"url": "https://osv.dev/vulnerability/CVE-2021-29604",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-29604",
"summary": "TensorFlow is an end-to-end open source platform for machine learning. The TFLite implementation of hashtable lookup is vulnerable to a division by zero error(https://github.com/tensorflow/tensorflow/blob/1a8e885b864c818198a5b2c0cbbeca5a1e833bc8/tensorflow/lite/kernels/hashtable_lookup.cc#L114-L115) An attacker can craft a model such that `values`'s first dimension would be 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-2021-29604",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-29604",
"aliases": [
"BIT-tensorflow-2021-29604",
"CVE-2021-29604",
"GHSA-8rm6-75mf-7r7r",
"PYSEC-2021-241",
"PYSEC-2021-532",
"PYSEC-2021-730"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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": "5117e0851348065ed59c991562c0ec80d9193db2"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.1.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.2.0"
},
{
"fixed": "2.2.3"
}
],
"source": "CPE_RANGE"
},
{
"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": "5117e0851348065ed59c991562c0ec80d9193db2"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v2.1.3",
"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-2021-29604.json",
"vanir_signatures": [
{
"id": "CVE-2021-29604-86a16a1e",
"digest": {
"length": 1400,
"function_hash": "191081793026311531790949102634207843258"
},
"source": "https://github.com/tensorflow/tensorflow/commit/5117e0851348065ed59c991562c0ec80d9193db2",
"target": {
"file": "tensorflow/lite/kernels/hashtable_lookup.cc",
"function": "Eval"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2021-29604-ff02e73e",
"digest": {
"threshold": 0.9,
"line_hashes": [
"113846231299445093603067850235213429916",
"78659140534013114368724993322264428562",
"56257027727385067485979458085631788381",
"102604769656003669449050504601508926916"
]
},
"source": "https://github.com/tensorflow/tensorflow/commit/5117e0851348065ed59c991562c0ec80d9193db2",
"target": {
"file": "tensorflow/lite/kernels/hashtable_lookup.cc"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:24:39Z"
}
}
],
"modified": "2026-10-20T14:24:39.158882350Z",
"provider": "osv",
"references": [
"https://github.com/tensorflow/tensorflow/commit/5117e0851348065ed59c991562c0ec80d9193db2",
"https://github.com/tensorflow/tensorflow/security/advisories/GHSA-8rm6-75mf-7r7r"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-29604",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388948,
"published_at": "2021-05-14T20:15:15.62+00:00"
}