Time-of-Check to Time-of-Use Race Condition in IBM AIX and PowerVM
CVE-2026-16922

7HIGH

Key Information:

Vendor

IBM
Status
Aix
Powervm ViOS
Vendor
CVE Published:
20 August 2026

What is CVE-2026-16922?

A vulnerability exists in IBM AIX and PowerVM that allows local attackers to exploit a time-of-check to time-of-use (TOCTOU) race condition. This flaw can lead to the execution of arbitrary code, enabling unauthorized actions within the affected systems. It is crucial for users of IBM AIX versions 7.2 and 7.3 and PowerVM VIOS version 4.1 to apply available patches and mitigate potential risks associated with this vulnerability.

Affected Version(s)

AIX 7.2

AIX 7.3

PowerVM VIOS 4.1

References

https://www.ibm.com/support/pages/node/7283858
vendor-advisorypatch

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVE-2026-14970, CVE-2026-15061, CVE-2026-15078, CVE-2026-15065, CVE-2026-15068 were reported to IBM by Oneconsult AG (https://oneconsult.com/).
.