CVE-2026-16913: 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

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.0.50
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.1.30Patch key_w_apar4.1.1IJ5956408/14/20264.1.1.30
Upgrade
Upgrade IBM PowerVM VIOS to a version that resolves this vulnerability.
Fixed in 4.1.2.20Patch key_w_apar4.1.2IJ5956308/14/20264.1.2.20
Operational
For the SP/FP update, perform an LPAR reboot to complete the AIX service pack / VIOS fix pack update.
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 steps required to migrate to the latest Postgres15.

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·07:55 PM

Data Sourced

via MITRE·07:55 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·08:17 PM

RemedyDescriptionSeverityWeaknessAffected Software

This vulnerability appears in the following advisories.