CVE-2026-16958

Received Received - Intake

Denial of Service 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 remote attacker to cause a denial of service 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-2026-16958

EUVD

EUVD-2026-63699

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 in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 allows a remote attacker to cause a denial of service through an out-of-bounds write. This means the attacker could send specially crafted data to trigger memory corruption, leading to system crashes or unresponsiveness.

Impact Analysis

If exploited, this vulnerability could cause your IBM AIX or PowerVM VIOS systems to become unavailable, disrupting services and operations. It may lead to downtime, data unavailability, and potential secondary impacts on dependent systems.

Compliance Impact

The vulnerability causes a denial of service due to an out-of-bounds write, which could disrupt system availability. This may impact compliance with standards like GDPR or HIPAA that require maintaining data availability and integrity, as service disruptions could lead to unauthorized access or data loss.

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 issue. Monitor IBM security advisories for fixes and restrict remote access to affected systems until patched.

Hi! I’m here to help you understand CVE-2026-16958. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70