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9.8

IBM AIX and PowerVM VIOS could let attackers run code remotely

CVE-2026-18832 · published 14 days ago
Summary

The AIX operating system versions 7.2 and 7.3, and the PowerVM VIOS version 4.1, contain a flaw that lets a remote attacker send crafted data to cause the system to execute unwanted code. This could let an attacker take control of the affected servers. Apply the latest IBM security patches as soon as possible to protect the systems.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ibm aix 7.2
>= 7.2.5, <= 7.2.5.212
>= 7.3.2, <= 7.3.2.5
>= 7.3.3, <= 7.3.3.2
>= 7.3.4, <= 7.3.4.1
ibm powervm vios 4.1
ibm vios >= 4.1.0, < 4.1.0.50
>= 4.1.1.0, < 4.1.1.30
>= 4.1.2.0, < 4.1.2.20
cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*
Original advisory text
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 heap-based buffer overflow.
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 heap-based buffer overflow.
References
Severity
9.8 Critical
CVSS 3.1: 8.8 (MITRE)
Exploitation
EPSS <1%
Type
CWE-787Out-of-bounds Write
Timeline
Published20 Aug 2026
Updated3 Sep 2026
First seen20 Aug 2026
Sources
CVE-2026-18832 · NVD
CVE-2026-18832 · MITRE
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