CVE-2026-16706: Vulnerabilities in IBM AIX and PowerVM VIOS

Q: Which systems should be prioritized for assessment?

IBM AIX and IBM PowerVM VIOS are identified as affected software.

Q: Does exploitation require an attacker to have local access?

The issue is described as exploitable by a remote attacker, so local access is not indicated as a requirement.

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 out-of-bounds write.

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 AIX 7.2 / 7.3 to a version that resolves this vulnerability.
Fixed in SP13Patch SPKEY7.2.5IJ5956608
Upgrade
Upgrade IBM AIX 7.3 TL04 to a version that resolves this vulnerability.
Fixed in SP2Patch IJ5956508
Upgrade
Upgrade IBM AIX 7.3 TL03 to a version that resolves this vulnerability.
Fixed in SP3Patch IJ5956408
Upgrade
Upgrade IBM AIX 7.3 TL02 to a version that resolves this vulnerability.
Fixed in SP5Patch IJ59563
Upgrade
Upgrade IBM PowerVM VIOS 4.1.0 to a version that resolves this vulnerability.
Fixed in 4.1.0.50Patch 4.1.0IJ5956508
Upgrade
Upgrade IBM PowerVM VIOS 4.1.1 to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch 4.1.1IJ5956408
Upgrade
Upgrade IBM PowerVM VIOS 4.1.2 to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch 4.1.2IJ5956308
Configuration
On AIX, use Live Update to avoid a reboot when applying SP/FP updates.
AIX Live Update reboot = avoided
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
After applying the AIX Service Pack (SP)/VIOS Fix Pack (FP) updates, perform an LPAR reboot to complete the SP/FP update (LPAR reboot required).

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·03:00 PM

Data Sourced

via MITRE·03:00 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·03:16 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

IBM-7283858

Frequently Asked Questions

Which systems should be prioritized for assessment?

IBM AIX and IBM PowerVM VIOS are identified as affected software.

Does exploitation require an attacker to have local access?

The issue is described as exploitable by a remote attacker, so local access is not indicated as a requirement.

CVE-2026-16706: Vulnerabilities in IBM AIX and PowerVM VIOS

Affected Software

Remediation

Event History

Parent advisories

Frequently Asked Questions

Which systems should be prioritized for assessment?

Does exploitation require an attacker to have local access?

Company

Resources

Contact