CVE-2026-17159: Vulnerabilities in IBM AIX and PowerVM VIOS

Published Aug 15, 2026

Updated

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 integer overflow.

Affected Software

10 affected components

IBM AIX<=7.2

IBM AIX<=7.3

IBM PowerVM VIOS<=4.1

IBM VIOS>=4.1.0<4.1.0.50

IBM VIOS>=4.1.1.0<4.1.1.30

IBM VIOS>=4.1.2.0<4.1.2.20

IBM AIX>=7.2.5<=7.2.5.212

IBM AIX>=7.3.2<=7.3.2.5

IBM AIX>=7.3.3<=7.3.3.2

IBM AIX>=7.3.4<=7.3.4.1

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade PowerVM VIOS 4.1.0 to a version that resolves this vulnerability.
Fixed in 4.1.0.50Patch IJ5956508
Upgrade
Upgrade PowerVM VIOS 4.1.1 to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch IJ5956408
Upgrade
Upgrade PowerVM VIOS 4.1.2 to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch IJ5956308
Compensating control
When applying AIX/VIOS patches using nimsh secure, follow the special steps mentioned in the article because the protocol between master and client is updated to be more secure.
Operational
Reboot the LPAR is required to complete the SP/FP update.
Operational
For VIOS 4.1.0 and VIOS 4.1.1, complete the additional steps to migrate to the latest Postgres15 after applying the 4.1.1.30 or 4.1.0.50 FPs.

Aug 15, 2026

CVE Published

via IBM·12:00 AM

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Aug 20, 2026

CVE Published

via MITRE·09:55 PM

Data Sourced

via MITRE·09:55 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·10:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

This vulnerability appears in the following advisories.