CVE-2026-18716

Received Received - Intake

IBM AIX and PowerVM VIOS Out-of-Bounds Read Vulnerability

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: IBM Corporation

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to obtain sensitive information or cause a denial of service due to an out-of-bounds read.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-20

Last Modified

2026-08-20

Generated

2026-08-21

AI Q&A

2026-08-21

EPSS Evaluated

N/A

NVD

CVE-2026-18716

EUVD

EUVD-2026-63739

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-125	The product reads 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 authenticated attacker to read beyond the intended memory area. This out-of-bounds read could expose sensitive information or disrupt system operations by causing a denial of service.

Impact Analysis

If exploited, this flaw may let attackers access confidential data or crash the system. Users of affected IBM AIX or PowerVM VIOS versions could face data breaches, service disruptions, or unauthorized system access.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR or HIPAA requirements for data protection and confidentiality. Organizations may face compliance penalties if sensitive data is compromised.

Mitigation Strategies

Apply IBM-provided patches or updates for AIX 7.2, 7.3, and PowerVM VIOS 4.1 to address the out-of-bounds read issue. Monitor IBM security advisories for fixes and restrict remote access to trusted users.

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