What is CVE-2026-19446?

CVE-2026-19446 is a high-severity vulnerability in IBM Aix, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-20.

How severe is CVE-2026-19446?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in IBM Aix

CVE-2026-19446

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 allows a remote unauthenticated attacker can send a crafted UDP packet to a reachable RPC service, resulting in complete system unavailability and requiring an LPAR restart.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ibm Aix — versions 7.2, 7.3
Ibm Powervm Vios — versions 4.1

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-19446?: CVE-2026-19446 is a high-severity vulnerability in IBM Aix, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-20.
How severe is CVE-2026-19446?: High severity. CVSS v3 base score is 7.5 out of 10.