Stack Buffer Overflow in IBM AIX and PowerVM
CVE-2026-16911

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-16911?

A vulnerability has been identified in IBM AIX versions 7.2 and 7.3, along with IBM PowerVM VIOS version 4.1, which could permit a remote authenticated attacker to execute arbitrary code on the affected systems. This security flaw arises due to a stack buffer overflow, potentially allowing attackers to manipulate aspects of the running environment. It is crucial for administrators and users of these platforms to apply the necessary patches and mitigations outlined in IBM's security advisory to safeguard against possible exploitation.

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:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
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/).
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