CVE-2021-29571: TensorFlow is an end-to-end open source platform for machine learning. The implementation of `tf.raw_ops.MaxPoolGradWith

TensorFlow, an open-source machine learning platform, has a vulnerability in the `tf.raw_ops.MaxPoolGradWithArgmax` function where attackers can provide specially crafted input data to read and write outside the bounds of heap-allocated memory (memory areas assigned during program execution), potentially causing memory corruption. The issue occurs because the code assumes the last element of the `boxes` input is 4 without checking it first, so attackers can pass smaller values to access memory they shouldn't.