CVE-2021-29577: TensorFlow is an end-to-end open source platform for machine learning. The implementation of `tf.raw_ops.AvgPool3DGrad`

A vulnerability called CVE-2021-29577 exists in TensorFlow (an open source platform for machine learning) in a function called `tf.raw_ops.AvgPool3DGrad`. The function has a heap buffer overflow (a memory safety bug where code writes data beyond the limits of allocated memory), which happens because the code assumes two data structures called `orig_input_shape` and `grad` tensors (multi-dimensional arrays of data) have matching dimensions but doesn't actually verify this before proceeding.