CVE-2026-16836: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which IBM products should be assessed for exposure?

The affected software list identifies IBM AIX and IBM PowerVM VIOS.

Q: Where is the vendor reference for this issue?

IBM provides a support reference at https://www.ibm.com/support/pages/node/7283858.

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 uncontrolled resource consumption.

Affected Software

10 affected components

IBM AIX<=7.2

IBM AIX<=7.3

IBM PowerVM VIOS<=4.1

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

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

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade IBM PowerVM VIOS 4.1.0 to a version that resolves this vulnerability.
Fixed in 4.1.0.50Patch 4.1.0IJ5956508/14/2026
Upgrade
Upgrade IBM PowerVM VIOS 4.1.1 to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch 4.1.1IJ5956408/14/2026
Upgrade
Upgrade IBM PowerVM VIOS 4.1.2 to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch 4.1.2IJ5956308/14/2026
Compensating control
For VIOS 4.1.0 and VIOS 4.1.1: after applying the 4.1.0.50 or 4.1.1.30 FPs, perform the additional required steps to migrate to the latest Postgres15.
Operational
For the AIX Service Pack / VIOS Fix Pack remediation update: reboot the LPAR to complete the SP/FP update.

Event History

Aug 15, 2026

CVE Published

via IBM·12:00 AM

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Aug 19, 2026

CVE Published

via MITRE·07:30 PM

Data Sourced

via MITRE·07:30 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·08:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

Which IBM products should be assessed for exposure?

The affected software list identifies IBM AIX and IBM PowerVM VIOS.

Where is the vendor reference for this issue?

IBM provides a support reference at https://www.ibm.com/support/pages/node/7283858.

CVE-2026-16836: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which IBM products should be assessed for exposure?

Where is the vendor reference for this issue?

Company

Resources

Contact