AVID-2026-R0914

Description

Heap OOB read in FusedBatchNorm kernels (CVE-2021-41223)

Details

TensorFlow is an open source platform for machine learning. In affected versions the implementation of FusedBatchNorm kernels is vulnerable to a heap OOB access. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.

Reason for inclusion in AVID: The AVID candidate CVE-2021-41223 describes a heap out-of-bounds read in TensorFlow’s FusedBatchNorm kernels. This is a software vulnerability in a core AI framework (TensorFlow) used to build, train, and deploy AI systems, making it directly relevant to AI pipelines. TensorFlow is a dependency/component in general-purpose AI stacks, so this constitutes a software supply chain issue within AI systems. The CVE-level impact (confidentiality and availability) confirms a security/safety vulnerability, and the report provides explicit evidence (CVE ID, affected versions, remediation commit, references).

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:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Base Score	7.1
Base Severity	🔴 High
Attack Vector	LOCAL
Attack Complexity	🟢 Low
Privileges Required	🟢 Low
User Interaction	NONE
Scope	UNCHANGED
Confidentiality Impact	🔴 High
Integrity Impact	NONE
Availability Impact	🔴 High

CWE

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

Other information

Report Type: Advisory
Credits:
Date Reported: 2021-11-05
Version: 0.3.3
AVID Entry