CVE-2026-16866 Vulnerabilities in IBM AIX and PowerVM VIOS
A remote attacker can cause a denial of service in IBM AIX and PowerVM VIOS via an out-of-bounds read vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16866?
CVE-2026-16866 is a medium-severity denial of service vulnerability in Ibm Aix, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.
Weakness: CWE-125
Which versions are affected by CVE-2026-16866?
It affects 2 products.
How do I fix CVE-2026-16866?
No fix has been published for CVE-2026-16866 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-16866 being exploited?
There is no known exploitation of CVE-2026-16866 in the wild and no public exploit code.
Other vulnerabilities in Ibm Aix
Sources
Also known as GHSA-6j8x-gqfv-mg99.