Low
Security advisory
In affected versions of TensorFlow running an LSTM/GRU model where the LSTM/GRU layer receives an input with zero-length results in a CHECK failure when using the CUDA backend. This can result in a query-of-death vulnerability, via denial of service, if users can control the input to the layer. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-26270
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:38 UTC · Revision 1
Source evidence
In affected versions of TensorFlow running an LSTM/GRU model where the LSTM/GRU layer receives an input with zero-length results in a CHECK failure when using the CUDA backend. This can result in a query-of-death vulnerability, via denial of service, if users can control the input to the layer. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.
osv:CVE-2020-26270
Complete source record
{
"id": "71e634dd91972d722c8a52fef503ac0443efbbb96716ccccf5f81fa72cf52138",
"url": "https://osv.dev/vulnerability/CVE-2020-26270",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-26270",
"summary": "In affected versions of TensorFlow running an LSTM/GRU model where the LSTM/GRU layer receives an input with zero-length results in a CHECK failure when using the CUDA backend. This can result in a query-of-death vulnerability, via denial of service, if users can control the input to the layer. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.",
"evidence": "osv:CVE-2020-26270",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2020-26270",
"aliases": [
"BIT-tensorflow-2020-26270",
"CVE-2020-26270",
"GHSA-m648-33qf-v3gp",
"PYSEC-2020-256",
"PYSEC-2020-301",
"PYSEC-2020-336"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/tensorflow/tensorflow",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3db52be7be81a87c623cdeb7f03d3767521c5246"
},
{
"introduced": "64c3d382cadf7bbe8e7e99884bede8284ff67f56"
},
{
"fixed": "cdf2c541c3dd3fb6d03cce4d23fc6c548bc9017c"
},
{
"introduced": "e5bf8de410005de06a7ff5393fafdf832ef1d4ad"
},
{
"fixed": "77f47d6ed6ca1f50b6f2c4919097e625d50398a9"
},
{
"introduced": "2b96f3662bd776e277f86997659e61046b56c315"
},
{
"fixed": "d745ff2a48cebf18e847e8b602a744e97e058946"
},
{
"introduced": "b36436b087bd8e8701ef51718179037cccdfc26e"
},
{
"fixed": "9edbe5075f79a4a95ed14a2be831f9b59e61f49d"
},
{
"fixed": "14755416e364f17fb1870882fa778c7fec7f16e3"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.15.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.0.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.1.0"
},
{
"fixed": "2.1.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.2.0"
},
{
"fixed": "2.2.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.3.0"
},
{
"fixed": "2.3.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "14755416e364f17fb1870882fa778c7fec7f16e3"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v2.1.2",
"v2.0.3",
"v1.15.4",
"v2.2.1",
"v2.3.1",
"v2.2.0",
"v2.1.1",
"v2.3.0",
"v2.0.2",
"v1.15.3",
"v2.0.1",
"v2.1.0",
"v1.15.2",
"v1.15.0",
"v1.15.0-rc3",
"v2.0.0",
"v1.15.0-rc2",
"v1.15.0-rc1",
"v1.15.0-rc0",
"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-2020-26270.json",
"vanir_signatures": [
{
"id": "CVE-2020-26270-36cb9890",
"digest": {
"threshold": 0.9,
"line_hashes": [
"166252882886534993164129206683886691984",
"82771836372170310932193629693836048928",
"130140444966903475628418281477362812430",
"31228978155751701708215333570039799818",
"71908040881237060325670982965864455659",
"165435079343752882710408888814154468784",
"130140444966903475628418281477362812430",
"31228978155751701708215333570039799818"
]
},
"source": "https://github.com/tensorflow/tensorflow/commit/14755416e364f17fb1870882fa778c7fec7f16e3",
"target": {
"file": "tensorflow/stream_executor/cuda/cuda_dnn.cc"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:10:26Z"
}
}
],
"modified": "2026-10-20T14:10:26.375668687Z",
"provider": "osv",
"references": [
"https://github.com/tensorflow/tensorflow/commit/14755416e364f17fb1870882fa778c7fec7f16e3",
"https://github.com/tensorflow/tensorflow/security/advisories/GHSA-m648-33qf-v3gp"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-26270",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388607,
"published_at": "2020-12-10T23:15:12.973+00:00"
}