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Security advisory

Type: advisorySources: OSVCVE: CVE-2021-29616

TensorFlow is an end-to-end open source platform for machine learning. The implementation of TrySimplify(https://github.com/tensorflow/tensorflow/blob/c22d88d6ff33031aa113e48aa3fc9aa74ed79595/tensorflow/core/grappler/optimizers/arithmetic_optimizer.cc#L390-L401) has undefined behavior due to dereferencing a null pointer in corner cases that result in optimizing a node with no inputs. 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-2021-29616
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 12:38 UTC · Revision 1

Source evidence

CVE-2021-29616

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 TrySimplify(https://github.com/tensorflow/tensorflow/blob/c22d88d6ff33031aa113e48aa3fc9aa74ed79595/tensorflow/core/grappler/optimizers/arithmetic_optimizer.cc#L390-L401) has undefined behavior due to dereferencing a null pointer in corner cases that result in optimizing a node with no inputs. 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-2021-29616
Complete source record
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  "url": "https://osv.dev/vulnerability/CVE-2021-29616",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29616",
    "summary": "TensorFlow is an end-to-end open source platform for machine learning. The implementation of TrySimplify(https://github.com/tensorflow/tensorflow/blob/c22d88d6ff33031aa113e48aa3fc9aa74ed79595/tensorflow/core/grappler/optimizers/arithmetic_optimizer.cc#L390-L401) has undefined behavior due to dereferencing a null pointer in corner cases that result in optimizing a node with no inputs. 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-2021-29616",
    "products": [],
    "severity": "high",
    "structured": {
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      "aliases": [
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        "CVE-2021-29616",
        "GHSA-4hvv-7x94-7vq8",
        "PYSEC-2021-253",
        "PYSEC-2021-544",
        "PYSEC-2021-742"
      ],
      "metrics": [
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          "database_specific": {
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            "vanir_signatures": [
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                "target": {
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      "modified": "2026-10-20T14:10:29.119737903Z",
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      "references": [
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    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 388614,
  "published_at": "2021-05-14T20:15:16.173+00:00"
}