CVE-2026-16922 Vulnerabilities in IBM AIX and PowerVM VIOS

High 7.0 Published 20 Aug 2026 Updated 21 Aug 2026

A local attacker can execute arbitrary code on IBM AIX and PowerVM VIOS systems due to a time-of-check to time-of-use race condition.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-16922?

CVE-2026-16922 is a high-severity vulnerability in Ibm Aix, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary code due to a time-of-check to time-of-use (TOCTOU) race condition.

Weakness: CWE-367

Which versions are affected by CVE-2026-16922?

It affects 2 products.

Products include Ibm Aix, Ibm Vios.

How do I fix CVE-2026-16922?

No fix has been published for CVE-2026-16922 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-16922 being exploited?

There is no known exploitation of CVE-2026-16922 in the wild and no public exploit code.

All Ibm Aix vulnerabilities

Sources

Also known as GHSA-4885-hmx6-9m68.