CVE-2026-16822: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which IBM products are listed as affected?

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

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

The issue is described as exploitable by a remote attacker. The provided information does not indicate that local access is required.

Published Aug 15, 2026

Updated

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to impersonate the TNC policy server and modify traffic due to improper certificate validation.

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
Operational
After applying the AIX Service Pack/VIOS Fix Pack remediation levels, perform an LPAR reboot to complete the SP/FP update.
Operational
For VIOS 4.1.0 and VIOS 4.1.1, perform the additional required 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·07:25 PM

Data Sourced

via MITRE·07:25 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 are listed as affected?

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

Does exploitation require local access to the affected system?

The issue is described as exploitable by a remote attacker. The provided information does not indicate that local access is required.

CVE-2026-16822: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which IBM products are listed as affected?

Does exploitation require local access to the affected system?

Company

Resources

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