CVE-2021-41213
Last modified
CVE-2021-41213 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. TensorFlow is an open source platform for machine learning. In affected versions the code behind `tf.function` API can be made to deadlock when two `tf.function` decorated Python functions are mutually recursive. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
TensorFlow is an open source platform for machine learning. In affected versions the code behind `tf.function` API can be made to deadlock when two `tf.function` decorated Python functions are mutually recursive. This occurs due to using a non-reentrant `Lock` Python object. Loading any model which contains mutually recursive functions is vulnerable. An attacker can cause denial of service by causing users to load such models and calling a recursive `tf.function`, although this is not a frequent scenario. 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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Tensorflow | >= 2.4.0, < 2.4.4 | — | |
| Tensorflow | >= 2.5.0, < 2.5.2 | — | |
| Tensorflow | >= 2.6.0, < 2.6.1 | — | |
| Tensorflow | 2.7.0 | Rc0 |
References
- https://github.com/tensorflow/tensorflow/commit/afac8158d43691661ad083f6dd9e56f327c1dcb7Patch, Third Party Advisory
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-h67m-xg8f-fxcfThird Party Advisory
- https://github.com/tensorflow/tensorflow/commit/afac8158d43691661ad083f6dd9e56f327c1dcb7Patch, Third Party Advisory
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-h67m-xg8f-fxcfThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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