CVE-2026-16846: Vulnerabilities in IBM AIX and PowerVM VIOS
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 a null pointer dereference.
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 4.1.0to a version that resolves this vulnerability.Fixed in 4.1.0.50 - Upgrade
Upgrade
IBM PowerVM VIOS 4.1.1to a version that resolves this vulnerability.Fixed in 4.1.1.30 - Compensating control
After applying the required AIX Service Pack (SP) / VIOS Fix Pack (FP), reboot the LPAR to complete the SP/FP update (LPAR reboot is required).
- Operational
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.
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·07:33 PM
Data Sourced
via MITRE·07:33 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Which IBM products are listed as affected?
The affected software listed is IBM AIX and IBM PowerVM VIOS.