CVE-2021-29515 — Reference binding to null pointer in `MatrixDiag*` ops

Description

TensorFlow is an end-to-end open source platform for machine learning. The implementation of `MatrixDiag*` operations(https://github.com/tensorflow/tensorflow/blob/4c4f420e68f1cfaf8f4b6e8e3eb857e9e4c3ff33/tensorflow/core/kernels/linalg/matrix_diag_op.cc#L195-L197) does not validate that the tensor arguments are non-empty. 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.

Vendor	Product	Affected	Fixed
tensorflow	tensorflow	< 2.1.4, >= 2.2.0, < 2.2.3, >= 2.3.0, < 2.3.3, >= 2.4.0, < 2.4.2	—

Ecosystem	Package	Affected	Fixed	Record
PyPI	tensorflow	< 2.1.4	2.1.4	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow	>= 2.2.0, < 2.2.3	2.2.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow	>= 2.3.0, < 2.3.3	2.3.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow	>= 2.4.0, < 2.4.2	2.4.2	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow	< 2.1.4 · >= 2.2.0, < 2.2.3 · >= 2.3.0, < 2.3.3 · >= 2.4.0, < 2.4.2	2.1.4, 2.2.3, 2.3.3, 2.4.2	PYSEC-2021-152
PyPI	tensorflow-cpu	< 2.1.4	2.1.4	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-cpu	>= 2.2.0, < 2.2.3	2.2.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-cpu	>= 2.3.0, < 2.3.3	2.3.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-cpu	>= 2.4.0, < 2.4.2	2.4.2	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-cpu	< 2.1.4 · >= 2.2.0, < 2.2.3 · >= 2.3.0, < 2.3.3 · >= 2.4.0, < 2.4.2	2.1.4, 2.2.3, 2.3.3, 2.4.2	PYSEC-2021-443
PyPI	tensorflow-gpu	< 2.1.4	2.1.4	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-gpu	>= 2.2.0, < 2.2.3	2.2.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-gpu	>= 2.3.0, < 2.3.3	2.3.3	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-gpu	>= 2.4.0, < 2.4.2	2.4.2	GHSA-hc6c-75p4-hmq4
PyPI	tensorflow-gpu	< 2.1.4 · >= 2.2.0, < 2.2.3 · >= 2.3.0, < 2.3.3 · >= 2.4.0, < 2.4.2	2.1.4, 2.2.3, 2.3.3, 2.4.2	PYSEC-2021-641