CVE-2026-18842

Received Received - Intake

Out-of-Bounds Write in IBM AIX and PowerVM VIOS

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 local attacker to gain elevated privileges due to an out-of-bounds write.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-18842

EUVD

EUVD-2026-63745

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

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds write issue in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a local attacker to gain elevated privileges by exploiting memory corruption.

Impact Analysis

A local attacker could exploit this flaw to gain higher privileges on the system, potentially leading to unauthorized access, data manipulation, or system compromise.

Compliance Impact

This vulnerability allows local attackers to gain elevated privileges through an out-of-bounds write in IBM AIX and PowerVM VIOS. Elevated privileges could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR or HIPAA if sensitive data is exposed.

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 write vulnerability. Monitor IBM's security advisories for fixes and follow their recommended mitigation steps.

Hi! I’m here to help you understand CVE-2026-18842. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70