Remote Code Execution Vulnerability in IBM AIX and PowerVM
CVE-2026-18840

8.2HIGH

Key Information:

Vendor

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

What is CVE-2026-18840?

A local vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 can be exploited by attackers to execute arbitrary code due to improper validation of a pointer controlled by the attacker. This flaw arises from the system's failure to adequately validate user-supplied input, allowing for potential unauthorized access and control over the affected systems.

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:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

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/).
.