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CVE-2021-37646
MEDIUM · CVSS 5.5
EPSS exploitation probability: 0%
Published 2021-08-12T21:15:07.983 · Last modified 2026-06-17T04:00:53.887

Summary

TensorFlow is an end-to-end open source platform for machine learning. In affected versions the implementation of `tf.raw_ops.StringNGrams` is vulnerable to an integer overflow issue caused by converting a signed integer value to an unsigned one and then allocating memory based on this value. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/string_ngrams_op.cc#L184) calls `reserve` on a `tstring` with a value that sometimes can be negative if user supplies negative `ngram_widths`. The `reserve` method calls `TF_TString_Reserve` which has an `unsigned long` argument for the size of the buffer. Hence, the implicit conversion transforms the negative value to a large integer. We have patched the issue in GitHub

Affected products

google — tensorflow

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.