CVE-2021-29617

Name: CVE-2021-29617
Creator: NVD / NIST
Published: 2021-05-14T20:15:16.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2021-29617 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. TensorFlow is an end-to-end open source platform for machine learning. An attacker can cause a denial of service via `CHECK`-fail in `tf.strings.substr` with invalid arguments. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

TensorFlow is an end-to-end open source platform for machine learning. An attacker can cause a denial of service via `CHECK`-fail in `tf.strings.substr` with invalid arguments. 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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.23%

13.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-755

Affected Software

Vendor	Product	Versions
Google	Tensorflow	< 2.1.4
Google	Tensorflow	>= 2.2.0, < 2.2.3
Google	Tensorflow	>= 2.3.0, < 2.3.3
Google	Tensorflow	>= 2.4.0, < 2.4.2

References

https://github.com/tensorflow/issues/46900Broken Link
https://github.com/tensorflow/issues/46974Broken Link
https://github.com/tensorflow/tensorflow/commit/890f7164b70354c57d40eda52dcdd7658677c09fPatch, Third Party Advisory
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-mmq6-q8r3-48fmExploit, Patch, Third Party Advisory
https://github.com/tensorflow/issues/46900Broken Link
https://github.com/tensorflow/issues/46974Broken Link
https://github.com/tensorflow/tensorflow/commit/890f7164b70354c57d40eda52dcdd7658677c09fPatch, Third Party Advisory
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-mmq6-q8r3-48fmExploit, Patch, Third Party Advisory

Timeline

Published: May 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29617?

How severe is CVE-2021-29617?

CVE-2021-29617 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29617?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29617?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST