CVE-2026-16862: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which products should be included in the initial triage scope?

Include IBM AIX and IBM PowerVM VIOS systems in the initial review scope.

Published Aug 15, 2026

Updated

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a stack buffer overflow.

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 AIX 7.2/7.3 to a version that resolves this vulnerability.
Patch IJ5956608
Upgrade
Upgrade AIX 7.3 to a version that resolves this vulnerability.
Patch IJ5956508
Upgrade
Upgrade AIX 7.3 to a version that resolves this vulnerability.
Patch IJ5956408
Upgrade
Upgrade AIX 7.3 to a version that resolves this vulnerability.
Patch IJ59563
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
Operational
After applying the AIX Service Pack (SP) or VIOS Fix Pack (FP) update, perform an LPAR reboot to complete the SP/FP update.
Operational
For VIOS 4.1.0 and VIOS 4.1.1, perform the additional post-update steps to migrate to the latest Postgres15 after applying the 4.1.0.50 or 4.1.1.30 FPs.

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·07:39 PM

Data Sourced

via MITRE·07:39 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 products should be included in the initial triage scope?

Include IBM AIX and IBM PowerVM VIOS systems in the initial review scope.

CVE-2026-16862: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which products should be included in the initial triage scope?

Company

Resources

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