CVE-2026-16819
Received Received - Intake

Time-of-Check Time-of-Use Race Condition in IBM AIX and PowerVM VIOS

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a denial of service and compromise data integrity due to a time-of-check time-of-use race condition.

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-19
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-16819
EUVD
EUVD-2026-62531

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
ibm aix From 7.2 (inc)
ibm aix From 7.3 (inc)
ibm powervm_vios From 4.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This is a time-of-check time-of-use (TOCTOU) race condition vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a local attacker to exploit timing issues to cause a denial of service and compromise data integrity.

Impact Analysis

A local attacker could exploit this to disrupt system operations, leading to service unavailability. It may also allow unauthorized modification of data, potentially causing corruption or loss of critical information.

Compliance Impact

This vulnerability could lead to data integrity issues, which may violate GDPR's requirement for accurate data processing and HIPAA's integrity and availability standards. Non-compliance risks include legal penalties and reputational damage.

Mitigation Strategies

Apply IBM-provided patches or updates for AIX 7.2, 7.3, and PowerVM VIOS 4.1 to address the time-of-check time-of-use race condition. Monitor IBM security advisories for fixes and test patches in a non-production environment before deployment.

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