CVE-2026-16864: 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 execute arbitrary code due to a stack 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 to a fixed release to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch IJ5956408 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 4.1.0.50Patch IJ5956508 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch IJ5956308 - Operational
LPAR reboot is required 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·07:39 PM
Data Sourced
via MITRE·07:39 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Is local access required to exploit this issue?
No. The issue is described as allowing a remote attacker to execute arbitrary code; no further prerequisites are provided.
2
Which IBM products are identified as affected?
The affected software listed is IBM AIX and IBM PowerVM VIOS.