Stack Buffer Overflow Vulnerability in IBM AIX and PowerVM
CVE-2026-16864

9.8CRITICAL

Key Information:

Vendor

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

What is CVE-2026-16864?

IBM AIX versions 7.2 and 7.3, along with IBM PowerVM VIOS 4.1, are susceptible to a stack buffer overflow that could be exploited by a remote attacker. This vulnerability enables the execution of arbitrary code, posing significant security risks. Organizations using these products should evaluate their exposure and apply the necessary patches to mitigate potential threats.

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/).
.