TensorFlowGHSA-h4pc-gx2w-f2xv

Heap OOB read in TFLite

CVE-2021-29606 · Published May 21, 2021 · updated Jul 8, 2026

Medium7.1

Fix: upgrade to 2.1.4 or later (4 fixed versions below)

Impact

A specially crafted TFLite model could trigger an OOB read on heap in the TFLite implementation of [Split_V](https://github.com/tensorflow/tensorflow/blob/c59c37e7b2d563967da813fa50fe20b21f4da683/tensorflow/lite/kernels/split_v.cc#L99):

```cc

const int input_size = SizeOfDimension(input, axis_value);

If axis_value is not a value between 0 and NumDimensions(input), then the [SizeOfDimension function](https://github.com/tensorflow/tensorflow/blob/102b211d892f3abc14f845a72047809b39cc65ab/tensorflow/lite/kernels/kernel_util.h#L148-L150) will access data outside the bounds of the tensor shape array:

```cc

inline int SizeOfDimension(const TfLiteTensor* t, int dim) {

return t->dims->data[dim];

}

Patches

We have patched the issue in GitHub commit [ae2daeb45abfe2c6dda539cf8d0d6f653d3ef412](https://github.com/tensorflow/tensorflow/commit/ae2daeb45abfe2c6dda539cf8d0d6f653d3ef412).

The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

For more information

Please consult [our security guide](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md) for more information regarding the security model and how to contact us with issues and questions.

Attribution

This...

Affected versions

Package	Affected	Fixed in
tensorflow PyPI	< 2.1.4	2.1.4
	>= 2.2.0, < 2.2.3	2.2.3
	>= 2.3.0, < 2.3.3	2.3.3
	>= 2.4.0, < 2.4.2	2.4.2

Details and references

### Impact A specially crafted TFLite model could trigger an OOB read on heap in the TFLite implementation of [`Split_V`](https://github.com/tensorflow/tensorflow/blob/c59c37e7b2d563967da813fa50fe20b21f4da683/tensorflow/lite/kernels/split_v.cc#L99): ```cc const int input_size = SizeOfDimension(input, axis_value); ``` If `axis_value` is not a value between 0 and `NumDimensions(input)`, then the [`SizeOfDimension` function](https://github.com/tensorflow/tensorflow/blob/102b211d892f3abc14f845a72047809b39cc65ab/tensorflow/lite/kernels/kernel_util.h#L148-L150) will access data outside the bounds of the tensor shape array: ```cc inline int SizeOfDimension(const TfLiteTensor* t, int dim) { return t->dims->data[dim]; } ``` ### Patches We have patched the issue in GitHub commit [ae2daeb45abfe2c6dda539cf8d0d6f653d3ef412](https://github.com/tensorflow/tensorflow/commit/ae2daeb45abfe2c6dda539cf8d0d6f653d3ef412). The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range. ### For more information Please consult [our security guide](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md) for more information regarding the security model and how to contact us with issues and questions. ### Attribution This vulnerability has been reported by members of the Aivul Team from Qihoo 360.

CVSS 3.1: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Severity from: GitHub (reviewed advisory)
Weakness: CWE-125
Also known as: BIT-tensorflow-2021-29606, CVE-2021-29606, PYSEC-2021-243, PYSEC-2021-534, PYSEC-2021-732

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