CVE-2021-29539

What it is

TensorFlow is an end-to-end open source platform for machine learning. Calling `tf.raw_ops.ImmutableConst`(https://www.tensorflow.org/api_docs/python/tf/raw_ops/ImmutableConst) with a `dtype` of `tf.resource` or `tf.variant` results in a segfault in the implementation as code assumes that the tensor contents are pure scalars. We have patched the issue in 4f663d4b8f0bec1b48da6fa091a7d29609980fa4 and will release TensorFlow 2.5.0 containing the patch. TensorFlow nightly packages after this commit will also have the issue resolved. If using `tf.raw_ops.ImmutableConst` in code, you can prevent the segfault by inserting a filter for the `dtype` argument.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-05-14 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:47 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.2% in the next 30 days (EPSS).
• Severity: 2.5 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-05-14 20:15 UTC

Last modified

2026-06-17 03:47 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-681

Record status

Modified

Affected

• Google Tensorflow < 2.1.4
• Google Tensorflow < 2.2.3
• Google Tensorflow < 2.3.3
• Google Tensorflow < 2.4.2

Attack profile CVSS 3.1 · 2.5

Attack vector

Local

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-29539.md and follow it. Check whether this project is affected by CVE-2021-29539. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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