Out-of-Bounds Write Vulnerability in IBM AIX and PowerVM
CVE-2026-16903

9.6CRITICAL

Key Information:

Vendor

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

What is CVE-2026-16903?

A vulnerability in IBM AIX versions 7.2 and 7.3, along with IBM PowerVM VIOS 4.1, allows remote attackers to exploit out-of-bounds write conditions. This could enable the execution of arbitrary code or lead to denial of service, potentially compromising system integrity and availability. Organizations using these affected versions should review the provided documentation to implement necessary patches and safeguard their environments.

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:
9.6
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
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/).
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