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TFSA-2021-108: Segfault in tf.raw_ops.ImmutableConst

CVE Number

CVE-2021-29539

Impact

Calling tf.raw_ops.ImmutableConst with a dtype of tf.resource or tf.variant results in a segfault in the implementation as code assumes that the tensor contents are pure scalars.

>>> import tensorflow as tf
>>> tf.raw_ops.ImmutableConst(dtype=tf.resource, shape=[],
>>> memory_region_name="/tmp/test.txt")
...
Segmentation fault

Patches

We have patched the issue in GitHub commit 4f663d4b8f0bec1b48da6fa091a7d29609980fa4.

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 for more information regarding the security model and how to contact us with issues and questions.