CVE-2026-16819 Vulnerabilities in IBM AIX and PowerVM VIOS

High 7.7 Published 19 Aug 2026 Updated 21 Aug 2026

A local attacker can exploit a race condition in IBM AIX and PowerVM VIOS to cause denial of service and compromise data integrity.

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

What is CVE-2026-16819?

CVE-2026-16819 is a high-severity vulnerability in Ibm Aix, published on 19 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 cause a denial of service and compromise data integrity due to a time-of-check time-of-use race condition.

Weakness: CWE-367

Which versions are affected by CVE-2026-16819?

It affects 2 products.

Products include Ibm Aix, Ibm Vios.

How do I fix CVE-2026-16819?

No fix has been published for CVE-2026-16819 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-16819 being exploited?

There is no known exploitation of CVE-2026-16819 in the wild and no public exploit code.

All Ibm Aix vulnerabilities

Sources

Also known as GHSA-vf7p-vx9f-2xvg.