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9.8

IBM AIX and PowerVM VIOS could let attackers run code

CVE-2026-17436 · published 14 days ago
Summary

Versions of IBM AIX (7.2 and 7.3) and PowerVM VIOS 4.1 contain a flaw where specially crafted data can overflow memory and let an outsider execute their own programs on the server. This could give a remote attacker control over the affected system. Apply the latest security updates from IBM as soon as possible to protect your environment.

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-2026-17436 · NVD
CVE-2026-17436 · MITRE
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