Stack-Based Buffer Overflow in IBM AIX and PowerVM Products
CVE-2026-16872

9.8CRITICAL

Key Information:

Vendor

IBM
Status
Aix
Powervm ViOS
Vendor
CVE Published:
19 August 2026

What is CVE-2026-16872?

A serious vulnerability exists within IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1, which enables remote attackers to exploit a stack-based buffer overflow. This could potentially allow for the execution of arbitrary code under certain conditions, posing a substantial risk to system integrity and security. Organizations using these IBM products should review their security configurations and apply the necessary patches provided by IBM to mitigate this vulnerability.

Affected Version(s)

AIX 7.2

AIX 7.3

PowerVM VIOS 4.1

References

https://www.ibm.com/support/pages/node/7283858
vendor-advisorypatch

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVE-2026-14970, CVE-2026-15061, CVE-2026-15078, CVE-2026-15065, CVE-2026-15068 were reported to IBM by Oneconsult AG (https://oneconsult.com/).
.