CVE-2026-19448 Vulnerabilities in IBM AIX and PowerVM VIOS

Medium 6.5 Published 20 Aug 2026 Updated 21 Aug 2026

A stack memory corruption in the AIX IPsec handler allows attackers to crash the system, causing denial of service.

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-2026-19448?

CVE-2026-19448 is a medium-severity memory corruption vulnerability in Ibm Aix, published on 20 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 A stack memory corruption vulnerability exists in the AIX IPsec ESP decapsulation handler. Successful exploitation may corrupt kernel stack state and cause a system crash, resulting in denial of service.

Weakness: CWE-908

Which versions are affected by CVE-2026-19448?

It affects 2 products.

Products include Ibm Aix, Ibm Vios.

How do I fix CVE-2026-19448?

No fix has been published for CVE-2026-19448 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-19448 being exploited?

There is no known exploitation of CVE-2026-19448 in the wild and no public exploit code.

All Ibm Aix vulnerabilities

Sources

Also known as GHSA-52xh-m68f-gh6g.