MediumVulnerability

CVE-2021-37692: TensorFlow Go segfault in string tensor deallocation during garbage collection

Source: NVD(opens in a new tab)
Identifier: CVE-2021-37692
Published: August 12, 2021
Record updated: October 9, 2026

Affected: tensorflow >= 2.5.0rc0, < 2.5.1
tensorflow-cpu >= 2.5.0rc0, < 2.5.1
tensorflow-gpu >= 2.5.0rc0, < 2.5.1
Fixed in: 2.5.1
tensorflow 2.5.1 released August 10, 2021, 3 days before disclosure
tensorflow-cpu 2.5.1 released August 10, 2021, 3 days before disclosure
tensorflow-gpu 2.5.1 released August 10, 2021, 3 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

TensorFlow's Go bindings can segfault during garbage collection of a string tensor whose encoding failed, for example because of mismatched dimensions. The `C.TF_TString_Dealloc` call in the finalizer assumes encoding succeeded, and tensor structure is only checked at encoding time to avoid a performance penalty. The affected versions are TensorFlow 2.5.1 and earlier versions of the same line.

Mitigation

Patched in GitHub commit 8721ba96e5760c229217b594f6d2ba332beedf22. The fix is included in TensorFlow 2.6.0 and cherry-picked to TensorFlow 2.5.1.

Details

Scores and exploitation

CVSS score: 5.5(medium)
Patch available: Yes
EPSS: 0.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 3, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-20

Affected

Packages: tensorflow@>= 2.5.0rc0, < 2.5.1 (fixed: 2.5.1)
tensorflow-cpu@>= 2.5.0rc0, < 2.5.1 (fixed: 2.5.1)
tensorflow-gpu@>= 2.5.0rc0, < 2.5.1 (fixed: 2.5.1)
Vendors: Google

Classification

Attack type: Denial of service
Attack sophistication: Moderate
AI component targeted: Framework
Impact: Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2021-37692

First tracked: February 15, 2026 at 08:40 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

tensorflowPyPINo LLM dependency detected · 26 tracked dependents
tensorflow-gpuPyPINo LLM dependency detected · 2 tracked dependents

Summary

Mitigation

Affected packages in the Exposure Registry

Related items