CVE-2026-17163

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 improper validation of an array size field.

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-2026-17163

EUVD

EUVD-2026-63723

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	aix	From 7.2 (inc)
ibm	aix	From 7.3 (inc)
ibm	powervm_vios	From 4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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 by exploiting improper validation of an array size field. This means the system fails to correctly check the size of an array before processing it, potentially leading to crashes or unresponsiveness.

Impact Analysis

If exploited, this vulnerability could disrupt services running on affected IBM AIX or PowerVM VIOS systems. It may cause system crashes, leading to downtime for critical applications or services dependent on these platforms.

Compliance Impact

This vulnerability could lead to a denial of service, which may disrupt the availability of critical systems. For compliance with standards like GDPR and HIPAA, availability is a key requirement. A denial of service could violate these regulations if it impacts the processing or protection of personal or health data.

Mitigation Strategies

Apply IBM AIX and PowerVM VIOS security patches or updates provided by IBM to address the improper array size validation issue. Monitor IBM security advisories for fixes and restrict remote access to affected systems until patched.

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