Stack Buffer Overflow in IBM AIX and PowerVM
CVE-2026-16885

9.8CRITICAL

Key Information:

Vendor

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

What is CVE-2026-16885?

A vulnerability exists in IBM AIX versions 7.2 and 7.3, along with IBM PowerVM VIOS 4.1, which could enable a remote attacker to execute arbitrary code on affected systems due to a stack buffer overflow flaw. This could lead to unauthorized access and control over the system, raising significant security concerns for organizations relying on these products. Prompt awareness and implementing recommended patches are essential for mitigating the risks presented by 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/).
.