Stack Buffer Overflow Vulnerability in IBM AIX and PowerVM
CVE-2026-16894

9.8CRITICAL

Key Information:

Vendor

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

What is CVE-2026-16894?

A vulnerability has been identified in IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. This vulnerability allows a remote attacker to execute arbitrary code on the affected systems due to a stack buffer overflow. By exploiting this weakness, unauthorized users may gain control over the affected components, posing a significant risk to system integrity and data security. It is essential for users to apply the latest patches and updates 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/).
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