CVE-2021-41221: google tensorflow Classic Buffer Overflow
Vulnerability summary
CVE-2021-41221 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in google tensorflow. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.7% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 05-11-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
TensorFlow is an open source platform for machine learning. In affected versions the shape inference code for the `Cudnn*` operations in TensorFlow can be tricked into accessing invalid memory, via a heap buffer overflow. This occurs because the ranks of the `input`, `input_h` and `input_c` parameters are not validated, but code assumes they have certain values. 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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · PypiEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
12%
Versus all other CVEs
30-day change
0.00 pp
From 0.22% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundTensorflow
Maturity: poc
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
PyPI3 products
- tensorflow≥ 2.6.0, < 2.6.1 | ≥ 2.5.0, < 2.5.2 | < 2.4.4 | < af5fcebb37c8b5d71c237f4e59c6477015c78ce6 | ≥ 2.7.0rc0, < 2.7.0
- tensorflow-cpu≥ 2.6.0, < 2.6.1 | ≥ 2.5.0, < 2.5.2 | < 2.4.4 | < af5fcebb37c8b5d71c237f4e59c6477015c78ce6 | ≥ 2.7.0rc0, < 2.7.0
- tensorflow-gpu≥ 2.6.0, < 2.6.1 | ≥ 2.5.0, < 2.5.2 | < 2.4.4 | < af5fcebb37c8b5d71c237f4e59c6477015c78ce6 | ≥ 2.7.0rc0, < 2.7.0
Google1 product
- tensorflow≥ 2.4.0, < 2.4.4 | ≥ 2.5.0, < 2.5.2 | ≥ 2.6.0, < 2.6.1 | 2.7.0:rc0 | 2.7.0:rc1
Tensorflow1 product
- tensorflow≥ 2.6.0, < 2.6.1 | ≥ 2.5.0, < 2.5.2 | < 2.4.4
3 vendors · 5 products
References
7 links- github.com/tensorflow/tensorflow/security/advisories/GHSA-cqv6-3phm-hcwxX Refsource CONFIRMWEBAdvisoryExploitPatchThird Party Advisory
- github.com/tensorflow/tensorflow/commit/af5fcebb37c8b5d71c237f4e59c6477015c78ce6X Refsource MISCWEBFIXPatchThird Party Advisory
