CVE-2026-16831: Vulnerabilities in IBM AIX and PowerVM VIOS
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 uncontrolled resource consumption.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
PowerVM VIOSto a version that resolves this vulnerability.Fixed in 4.1.0.50 - Upgrade
Upgrade
PowerVM VIOSto a version that resolves this vulnerability.Fixed in 4.1.1.30 - Upgrade
Upgrade
PowerVM VIOSto a version that resolves this vulnerability.Fixed in 4.1.2.20 - Compensating control
For VIOS 4.1.0 and VIOS 4.1.1, after applying the 4.1.0.50 or 4.1.1.30 FP respectively, perform the additional steps required to migrate to the latest Postgres15.
- Operational
Perform an LPAR reboot to complete the AIX service pack / VIOS fix pack update.
Event History
Frequently Asked Questions
Which environments should be prioritized for review?
Systems running IBM AIX or IBM PowerVM VIOS should be reviewed, as both products are identified as affected.
What access or prerequisites does an attacker need?
The available information identifies the attacker as remote, but it does not state whether authentication, specific privileges, or a particular service exposure is required.
Are affected versions, configurations, or temporary mitigations identified?
No affected version range, configuration conditions, or workaround is provided in the available data.