CVE-2026-16909: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which products are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.

Q: Does exploitation require local access to the affected system?

No. The vulnerability is described as allowing a remote attacker to execute arbitrary code.

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 an off-by-one error in bounds checking.

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

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.0.50Patch IJ5956508
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch IJ5956408
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch IJ5956308
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 steps required to migrate to the latest Postgres15.
Operational
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·07:55 PM

Data Sourced

via MITRE·07:55 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 are identified as affected?

The affected software listed is IBM AIX and IBM PowerVM VIOS.

Does exploitation require local access to the affected system?

No. The vulnerability is described as allowing a remote attacker to execute arbitrary code.

CVE-2026-16909: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which products are identified as affected?

Does exploitation require local access to the affected system?

Company

Resources

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