What is CVE-2026-19442?

CVE-2026-19442 is a high-severity vulnerability in IBM Aix, classified under Untrusted Pointer Dereference. CVSS score: 8.2/10. Published 2026-08-20.

How severe is CVE-2026-19442?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in IBM Aix

CVE-2026-19442

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a pointer validation flaw exists in the AIX Virtual SCSI (vSCSI) initiator driver. Successful exploitation may result in denial of service, privilege escalation, or full compromise of the client LPAR kernel.

Published 2026-08-20 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

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

Weakness classification (CWE)

CWE-822 — Untrusted Pointer Dereference

References

www.ibm.com/support/pages/node/7283858 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-19442?: CVE-2026-19442 is a high-severity vulnerability in IBM Aix, classified under Untrusted Pointer Dereference. CVSS score: 8.2/10. Published 2026-08-20.
How severe is CVE-2026-19442?: High severity. CVSS v3 base score is 8.2 out of 10.