HighVulnerability

CVE-2021-41211: TensorFlow heap out-of-bounds read in QuantizeV2 shape inference

Source: NVD(opens in a new tab)
Identifier: CVE-2021-41211
Published: November 5, 2021
Record updated: October 9, 2026

Affected: tensorflow = 2.6.0
tensorflow-cpu = 2.6.0
tensorflow-gpu = 2.6.0
Fixed in: 2.6.1
tensorflow 2.6.1 released November 1, 2021, 5 days before disclosure
tensorflow-cpu 2.6.1 released November 1, 2021, 5 days before disclosure
tensorflow-gpu 2.6.1 released November 1, 2021, 5 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

CVE-2021-41211 affects TensorFlow. The shape inference code for `QuantizeV2` performs a heap out-of-bounds read whenever `axis` is a negative value less than `-1`, because the code assumes `axis` is a valid index into the `input` tensor's dimensions. The fix will be included in TensorFlow 2.7.0 and cherry-picked to TensorFlow 2.6.1, the only other affected version.

Mitigation

Fixed in TensorFlow 2.7.0; the fix will also be cherry-picked to TensorFlow 2.6.1.

Details

Scores and exploitation

CVSS score: 7.1(high)
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 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-125
CWE-125
Attack pattern (CAPEC): CAPEC-540

Affected

Packages: tensorflow@= 2.6.0 (fixed: 2.6.1)
tensorflow-cpu@= 2.6.0 (fixed: 2.6.1)
tensorflow-gpu@= 2.6.0 (fixed: 2.6.1)
Vendors: Google

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Framework
Impact: Confidentiality,
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-2021-41211

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

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

Classifier confidence: 95% (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

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