CVE-2021-37643

TensorFlow is an end-to-end open source platform for machine learning. If a user does not provide a valid padding value to `tf.raw_ops.MatrixDiagPartOp`, then the code triggers a null pointer dereference (if input is empty) or produces invalid behavior, ignoring all values after the first. The [implementation](https://github.com/tensorflow/tensorflow/blob/8d72537c6abf5a44103b57b9c2e22c14f5f49698/tensorflow/core/kernels/linalg/matrix_diag_op.cc#L89) reads the first value from a tensor buffer without first checking that the tensor has values to read from. We have patched the issue in GitHub commit 482da92095c4d48f8784b1f00dda4f81c28d2988. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.

• CWE-476

• https://github.com/tensorflow/tensorflow/commit/482da92095c4d48f8784b1f00dda4f81c28d2988Patch, Third Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-fcwc-p4fc-c5ccThird Party Advisory
• https://github.com/tensorflow/tensorflow/commit/482da92095c4d48f8784b1f00dda4f81c28d2988Patch, Third Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-fcwc-p4fc-c5ccThird Party Advisory

Published

Aug 12, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-37638TensorFlow is an end-to-end open source platform for machine…7.8
• CVE-2021-37639TensorFlow is an end-to-end open source platform for machine…7.8
• CVE-2021-3764A memory leak flaw was found in the Linux kernel's ccp_run_a…5.5
• CVE-2021-37640TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37641TensorFlow is an end-to-end open source platform for machine…7.1
• CVE-2021-37642TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37644TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37645TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37646TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37647TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-37648TensorFlow is an end-to-end open source platform for machine…7.8
• CVE-2021-37649TensorFlow is an end-to-end open source platform for machine…5.5