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AVID-2026-R0848
Description
Reference binding to nullptr in MatrixSetDiagV* ops in TensorFlow (CVE-2021-37658)
Details
TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can cause undefined behavior via binding a reference to null pointer in all operations of type tf.raw_ops.MatrixSetDiagV*. The implementation has incomplete validation that the value of k is a valid tensor. We have check that this value is either a scalar or a vector, but there is no check for the number of elements. If this is an empty tensor, then code that accesses the first element of the tensor is wrong. We have patched the issue in GitHub commit ff8894044dfae5568ecbf2ed514c1a37dc394f1b. 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.
Reason for inclusion in AVID: CVE-2021-37658 describes a bug in TensorFlow’s MatrixSetDiagV* ops causing undefined behavior by binding a reference to a null pointer. This is a software vulnerability in a widely-used AI framework. TensorFlow is used to build/train/deploy AI systems; thus the issue is in a component of the software stack used to run general-purpose AI systems. It is not hardware/firmware-only. The CVE indicates potential security impact, and the report includes affected versions and a patch commit, providing sufficient signal for AVID curation.
References
- NVD entry
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-6p5r-g9mq-ggh2
- https://github.com/tensorflow/tensorflow/commit/ff8894044dfae5568ecbf2ed514c1a37dc394f1b
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:N/I:H/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 | NONE |
| Integrity Impact | 🔴 High |
| Availability Impact | 🔴 High |
CWE
| ID | Description |
|---|---|
| CWE-824 | CWE-824: Access of Uninitialized Pointer |
Other information
- Report Type: Advisory
- Credits:
- Date Reported: 2021-08-12
- Version: 0.3.3
- AVID Entry