AVID-2026-R0758

Description

OOB read in MatrixTriangularSolve (CVE-2021-29551)

Details

TensorFlow is an end-to-end open source platform for machine learning. The implementation of MatrixTriangularSolve(https://github.com/tensorflow/tensorflow/blob/8cae746d8449c7dda5298327353d68613f16e798/tensorflow/core/kernels/linalg/matrix_triangular_solve_op_impl.h#L160-L240) fails to terminate kernel execution if one validation condition fails. 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.

Reason for inclusion in AVID: The CVE describes an out-of-bounds read in TensorFlow’s MatrixTriangularSolve, a vulnerability within a widely-used AI framework. It affects a software component (TensorFlow) that is core to building, training, deploying, and running general-purpose AI systems, representing a software supply-chain vulnerability in AI stacks. Public references (NVD entry, GitHub advisory, commit) provide evidence and a fix, satisfying security-safety criteria.

References

Affected or Relevant Artifacts

Developer: tensorflow
Deployer: tensorflow
Artifact Details:

Type	Name
System	tensorflow

Impact

AVID Taxonomy Categorization

Risk domains: Security
SEP subcategories: S0100: Software Vulnerability
Lifecycle stages: L06: Deployment

CVSS

Version	3.1
Vector String	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score	2.5
Base Severity	🟢 Low
Attack Vector	LOCAL
Attack Complexity	🔴 High
Privileges Required	🟢 Low
User Interaction	NONE
Scope	UNCHANGED
Confidentiality Impact	NONE
Integrity Impact	NONE
Availability Impact	🟢 Low

CWE

ID	Description
CWE-125	CWE-125: Out-of-bounds Read

Other information

Report Type: Advisory
Credits:
Date Reported: 2021-05-14
Version: 0.3.3
AVID Entry