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9.8

IBM AIX and PowerVM VIOS Stack Buffer Overflow

CVE-2026-16862 · published 1 month ago
Summary

IBM AIX 7.2 and 7.3, and PowerVM VIOS 4.1 are affected. This vulnerability could allow a remote attacker to take control of your system. IBM has likely released a patch or fix to address this issue, which you should install as soon as possible.

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
ibm powervm vios 4.1
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 stack 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 stack buffer overflow.
References
Severity
9.8 Critical
CVSS 3.1: 9.8 (NVD)
Exploitation
EPSS <1%
Type
CWE-787Out-of-bounds Write
Timeline
Published19 Aug 2026
Updated27 Sep 2026
First seen19 Aug 2026
Sources
CVE-2026-16862 · NVD
CVE-2026-16862 · MITRE
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