Out-of-Bounds Read Vulnerability in IBM AIX and PowerVM Products
CVE-2026-16866

4.8MEDIUM

Key Information:

Vendor

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

What is CVE-2026-16866?

The vulnerability allows remote attackers to exploit certain versions of IBM AIX and PowerVM, potentially causing denial of service through an out-of-bounds read. This flaw emphasizes the need for timely system updates and security patches to mitigate such risks. Organizations utilizing affected IBM products should assess their systems and apply necessary patches as advised by the vendor.

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:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
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/).
.