CVE-2021-41203 json
Missing validation during checkpoint loading
published 2021-11-05 5 y ago modified 2026-09-08 2 mo ago also BIT-tensorflow-2021-41203 , EUVD-2021-0426 , GHSA-7pxj-m4jf-r6h2 , PYSEC-2021-396 , PYSEC-2021-613 , PYSEC-2021-811
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
TensorFlow is an open source platform for machine learning. In affected versions an attacker can trigger undefined behavior, integer overflows, segfaults and `CHECK`-fail crashes if they can change saved checkpoints from outside of TensorFlow. This is because the checkpoints loading infrastructure is missing validation for invalid file formats. The fixes will be included in TensorFlow 2.7.0. We will also cherrypick these commits on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.
Patch / fix
- pypi tensorflow 2.4.4, 2.5.2, 2.6.1, 2.7.0
- pypi tensorflow-cpu 2.4.4, 2.5.2, 2.6.1, 2.7.0
- pypi tensorflow-gpu 2.4.4, 2.5.2, 2.6.1, 2.7.0
- bitnami tensorflow 2.4.4, 2.5.2, 2.6.1
- google tensorflow 2.4.4, 2.5.2, 2.6.1
- tensorflow Arch Linux 2.6.1-1
arch linux advisories AVG-2529
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
| OSV | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | tensorflow | >=2.6.0, <2.6.1 >=2.5.0, <2.5.2 <2.4.4 >=2.7.0rc0, <2.7.0 |
2.6.1 2.5.2 2.4.4 2.7.0 |
| pypi | tensorflow-cpu | >=2.6.0, <2.6.1 >=2.5.0, <2.5.2 <2.4.4 >=2.7.0rc0, <2.7.0 |
2.6.1 2.5.2 2.4.4 2.7.0 |
| pypi | tensorflow-gpu | >=2.6.0, <2.6.1 >=2.5.0, <2.5.2 <2.4.4 >=2.7.0rc0, <2.7.0 |
2.6.1 2.5.2 2.4.4 2.7.0 |
| bitnami | tensorflow | <2.4.4 >=2.5.0, <2.5.2 >=2.6.0, <2.6.1 |
2.4.4 2.5.2 2.6.1 |
Affected products
- tensorflow tensorflow
Classification
References
-
github.com
/tensorflow/tensorflow/commit/368af875869a204b4ac552b9ddda59f6a46a56ec
web, patch, third-party-advisory, advisory
-
github.com
/tensorflow/tensorflow/commit/abcced051cb1bd8fb05046ac3b6023a7ebcc4578
web, patch, third-party-advisory, advisory
-
github.com
/tensorflow/tensorflow/commit/b619c6f865715ca3b15ef1842b5b95edbaa710ad
web, patch, third-party-advisory, advisory
-
github.com
/tensorflow/tensorflow/commit/e8dc63704c88007ee4713076605c90188d66f3d2
web, patch, third-party-advisory, advisory
-
github.com
/tensorflow/tensorflow/security/advisories/GHSA-7pxj-m4jf-r6h2
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-41203
advisory, web
-
github.com
/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-613.yaml
web
-
github.com
/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-811.yaml
web
-
github.com
/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-396.yaml
web
-
github.com
/tensorflow/tensorflow
package
Sources
- CVE List CVE-2021-41203
- GitHub Advisory GHSA-7pxj-m4jf-r6h2
- NVD CVE-2021-41203
- OSV BIT-tensorflow-2021-41203
- OSV PYSEC-2021-396
- OSV PYSEC-2021-613
- OSV PYSEC-2021-811
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.