CVE-2026-16944: 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 local attacker to execute arbitrary code due to a stack-based buffer overflow.
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
PowerVM VIOS 4.1.0to a version that resolves this vulnerability.Fixed in 4.1.0.50 - Upgrade
Upgrade
PowerVM VIOS 4.1.1to a version that resolves this vulnerability.Fixed in 4.1.1.30Patch key_w_apar4.1.1IJ5956408/14/2026 - Upgrade
Upgrade
PowerVM VIOS 4.1.2to a version that resolves this vulnerability.Fixed in 4.1.2.20Patch key_w_apar4.1.2IJ5956308/14/2026 - Operational
Perform an LPAR reboot 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 20, 2026
CVE Published
via MITRE·09:33 PM
Data Sourced
via MITRE·09:33 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·10:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Does exploitation require network access?
The vulnerability is described as requiring a local attacker. The provided information does not indicate remote exploitation.
2
Is PowerVM VIOS included in the affected software?
Yes. The affected software list includes IBM PowerVM VIOS as well as IBM AIX.