CVE-2021-37681

Description

TensorFlow is an end-to-end open source platform for machine learning. In affected versions the implementation of SVDF in TFLite is [vulnerable to a null pointer error](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/svdf.cc#L300-L313). The [`GetVariableInput` function](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/kernel_util.cc#L115-L119) can return a null pointer but `GetTensorData` assumes that the argument is always a valid tensor. Furthermore, because `GetVariableInput` calls [`GetMutableInput`](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/kernel_util.cc#L82-L90) which might return `nullptr`, the `tensor->is_variable` expression can also trigger a null pointer exception. We have patched the issue in GitHub commit 5b048e87e4e55990dae6b547add4dae59f4e1c76. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.

Reserved 2021-07-29 | Published 2021-08-12 | Updated 2024-08-04 | Assigner GitHub_M

Problem types

CWE-476: NULL Pointer Dereference

Product status

>= 2.5.0, < 2.5.1
affected

>= 2.4.0, < 2.4.3
affected

< 2.3.4
affected

References

github.com/...orflow/security/advisories/GHSA-7xwj-5r4v-429p

github.com/...ommit/5b048e87e4e55990dae6b547add4dae59f4e1c76

cve.org (CVE-2021-37681)

nvd.nist.gov (CVE-2021-37681)

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