CVE-2026-16903

Analyzed Analyzed - Analysis Complete

Remote Code Execution in IBM AIX and PowerVM VIOS

Publication date: 2026-08-19

Last updated on: 2026-08-21

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 or cause a denial of service due to an out-of-bounds write.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-19

Last Modified

2026-08-21

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-16903

EUVD

EUVD-2026-62829

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	vios	From 4.1.0 (inc) to 4.1.0.50 (exc)
ibm	vios	From 4.1.1.0 (inc) to 4.1.1.30 (exc)
ibm	vios	From 4.1.2.0 (inc) to 4.1.2.20 (exc)
ibm	aix	From 7.2.5 (inc) to 7.2.5.212 (inc)
ibm	aix	From 7.3.2 (inc) to 7.3.2.5 (inc)
ibm	aix	From 7.3.3 (inc) to 7.3.3.2 (inc)
ibm	aix	From 7.3.4 (inc) to 7.3.4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 allows a remote attacker to execute arbitrary code or cause a denial of service through an out-of-bounds write issue.

Detection Guidance

This vulnerability involves an out-of-bounds write in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1. Detection requires checking for affected versions and applying IBM's official patches. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to run malicious code on your system or crash it, potentially leading to data loss, unauthorized access, or service disruption.

Compliance Impact

This vulnerability could allow remote attackers to execute arbitrary code or cause denial of service, potentially leading to unauthorized data access or system disruption. Such risks may impact compliance with standards like GDPR (data protection) and HIPAA (healthcare data security) by compromising confidentiality, integrity, or availability of sensitive information.

Mitigation Strategies

Apply the latest IBM AIX or PowerVM VIOS security patches immediately. Isolate affected systems from untrusted networks. Monitor IBM PSIRT advisories for updates.

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