CVE-2021-41214: TensorFlow is an open source platform for machine learning. In affected versions the shape inference code for `tf.ragged

TensorFlow, an open source machine learning platform, has a bug in its shape inference code for the `tf.ragged.cross` function where it tries to use a null pointer (a reference to nothing), causing undefined behavior. The vulnerability is caused by accessing an uninitialized pointer (a memory location that hasn't been set up yet).