What’s Vulnerable › Vulnerabilities

CVE-2021-41204: Segfault while copying constant resource tensor

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-05 · updated 2026-06-17
• Weakness: CWE-824

Description

TensorFlow is an open source platform for machine learning. In affected versions during TensorFlow's Grappler optimizer phase, constant folding might attempt to deep copy a resource tensor. This results in a segfault, as these tensors are supposed to not change. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.

Affected products

• tensorflow: before 2.4.4; from 2.5.0 before 2.5.2; from 2.6.0 before 2.6.1 — fixed in 2.4.4, 2.5.2, 2.6.1

How to fix

Upgrade to a fixed version: tensorflow 2.4.4, 2.5.2, 2.6.1. Check the vendor advisory for mitigations.

References

• https://github.com/tensorflow/tensorflow/commit/7731e8dfbe4a56773be5dc94d631611211156659
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-786j-5qwq-r36x
• https://github.com/tensorflow/tensorflow/commit/7731e8dfbe4a56773be5dc94d631611211156659
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-786j-5qwq-r36x

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