CVE-2026-16909

Received Received - Intake

Off-by-One Error in IBM AIX and PowerVM VIOS Allows Remote Code Execution

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to an off-by-one error in bounds checking.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-16909

EUVD

EUVD-2026-62830

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	aix	7.2
ibm	aix	7.3
ibm	powervm_vios	4.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-128	Wrap around errors occur whenever a value is incremented past the maximum value for its type and therefore "wraps around" to a very small, negative, or undefined value.

Attack-Flow Graph

Executive Summary

This vulnerability is an off-by-one error in bounds checking in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a remote attacker to execute arbitrary code by exploiting this flaw in the software's input validation.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your system remotely. This could lead to unauthorized access, data theft, or system compromise, potentially disrupting operations or causing data loss.

Compliance Impact

This vulnerability could lead to data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations may face legal penalties, reputational damage, and loss of trust if such breaches occur due to unpatched systems.

Mitigation Strategies

Apply IBM-provided patches or updates for AIX 7.2, 7.3, and PowerVM VIOS 4.1 to address the off-by-one error in bounds checking. Isolate affected systems from untrusted networks until patched.

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