CVE-2026-16967

Undergoing Analysis Undergoing Analysis - In Progress

IBM i Race Condition in Symbolic Links

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to gain unauthorized access to system objects due to a time-of-check to time-of-use (TOCTOU) race condition involving symbolic links.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-13

Last Modified

2026-08-13

Generated

2026-08-14

AI Q&A

2026-08-14

EPSS Evaluated

N/A

NVD

CVE-2026-16967

EUVD

EUVD-2026-58382

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.6
ibm	i	7.5
ibm	i	7.4
ibm	i	7.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-367	The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

Attack-Flow Graph

Executive Summary

This vulnerability is a time-of-check to time-of-use (TOCTOU) race condition involving symbolic links in IBM i versions 7.6, 7.5, 7.4, and 7.3. A remote authenticated attacker could exploit this to gain unauthorized access to system objects.

Impact Analysis

An attacker could exploit this to gain unauthorized access to sensitive system objects, potentially leading to data breaches, privilege escalation, or system compromise. The impact includes confidentiality, integrity, and availability risks.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements such as GDPR (data protection) and HIPAA (health information privacy). Organizations may face penalties or legal consequences.

Mitigation Strategies

Apply IBM i PTFs or updates as soon as they become available to address the TOCTOU race condition. Monitor IBM security bulletins for patches and restrict remote authenticated access until fixes are applied.

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