TI-2021-15518 Aliases CVE-2021-37643 GHSA-fcwc-p4fc-c5cc

Null pointer dereference in `MatrixDiagPartOp` in TensorFlow

LOW 33CWE-476Published 2021-08-12 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-476.

Summary

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.

Why it matters now

EPSS 0.0016 5th percentileScored 2026-11-07

Fix Fixed tensorflow (tensorflow): 2.5.1, 2.4.3, 2.3.4tensorflow (PyPI): 2.3.4, 2.4.3, 2.5.1+2 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Google	tensorflow	2.5.0 to before 2.5.1; 2.4.0 to before 2.4.3; before 2.3.4	2.5.1, 2.4.3, 2.3.4	Patch available	CNA
—	tensorflow (PyPI)	before 2.3.4	2.3.4	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow (PyPI)	2.4.0 to before 2.4.3	2.4.3	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow (PyPI)	2.5.0 to before 2.5.1	2.5.1	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-cpu (PyPI)	before 2.3.4	2.3.4	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-cpu (PyPI)	2.4.0 to before 2.4.3	2.4.3	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-cpu (PyPI)	2.5.0 to before 2.5.1	2.5.1	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-gpu (PyPI)	before 2.3.4	2.3.4	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-gpu (PyPI)	2.4.0 to before 2.4.3	2.4.3	Patch available	GHSA-fcwc-p4fc-c5cc
—	tensorflow-gpu (PyPI)	2.5.0 to before 2.5.1	2.5.1	Patch available	GHSA-fcwc-p4fc-c5cc

tensorflow VendorGoogle Affected 2.5.0 to before 2.5.1; 2.4.0 to before 2.4.3; before 2.3.4 Fixed in 2.5.1, 2.4.3, 2.3.4 Patch available CNA
tensorflow (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-cpu (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-cpu (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-cpu (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-gpu (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-gpu (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-fcwc-p4fc-c5cc
tensorflow-gpu (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-fcwc-p4fc-c5cc

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:a:google:tensorflow::::::::	2.3.0 to before 2.3.4; 2.4.0 to before 2.4.3	Vulnerable	Google
cpe:2.3:a:google:tensorflow:2.5.0:::::::*	2.5.0	Vulnerable	Google
cpe:2.3:a:google:tensorflow:2.6.0:rc0::::::	2.6.0 rc0	Vulnerable	Google
cpe:2.3:a:google:tensorflow:2.6.0:rc1::::::	2.6.0 rc1	Vulnerable	Google
cpe:2.3:a:google:tensorflow:2.6.0:rc2::::::	2.6.0 rc2	Vulnerable	Google

cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:* Versions 2.3.0 to before 2.3.4; 2.4.0 to before 2.4.3 Vulnerable ·Google
cpe:2.3:a:google:tensorflow:2.5.0:*:*:*:*:*:*:* Versions 2.5.0 Vulnerable ·Google
cpe:2.3:a:google:tensorflow:2.6.0:rc0:*:*:*:*:*:* Versions 2.6.0 rc0 Vulnerable ·Google
cpe:2.3:a:google:tensorflow:2.6.0:rc1:*:*:*:*:*:* Versions 2.6.0 rc1 Vulnerable ·Google
cpe:2.3:a:google:tensorflow:2.6.0:rc2:*:*:*:*:*:* Versions 2.6.0 rc2 Vulnerable ·Google

Remediation

Fix · CNA tensorflow (tensorflow) Fixed in 2.5.1, 2.4.3, 2.3.4
Fix · GHSA-fcwc-p4fc-c5cc tensorflow (PyPI) Fixed in 2.3.4 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow (PyPI) Fixed in 2.4.3 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow (PyPI) Fixed in 2.5.1 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-cpu (PyPI) Fixed in 2.3.4 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-cpu (PyPI) Fixed in 2.4.3 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-cpu (PyPI) Fixed in 2.5.1 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-gpu (PyPI) Fixed in 2.3.4 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-gpu (PyPI) Fixed in 2.4.3 Advisory →
Fix · GHSA-fcwc-p4fc-c5cc tensorflow-gpu (PyPI) Fixed in 2.5.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-37643
2026-10-03 Alias added: GHSA-fcwc-p4fc-c5cc

References

Patch 1

https://github.com/tensorflow/tensorflow/commit/482da92095c4d48f8784b1f00dda4f81c28d2988

Advisory 2

Other 4

TI-2022-20241 FractionalMaxPool and FractionalAVGPool heap out-of-bounds acess in Tensorflow CVSS 3.1CRITICAL 9.8
TI-2022-07640 Integer overflow in Tensorflow CVSS 3.1CRITICAL 9.8
TI-2022-07627 Out of bounds read and write in Tensorflow CVSS 3.1HIGH 8.8
TI-2022-07619 Out of bounds write in Tensorflow CVSS 3.1HIGH 8.8
TI-2022-07613 Read and Write outside of bounds in TFLite CVSS 3.1HIGH 8.8
TI-2022-07612 Integer overflow in TFLite CVSS 3.1HIGH 8.8

See all 430 →

Sources

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