CVE-2026-17120

Received Received - Intake

Buffer Overflow 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 a buffer overflow.

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-2026-17120

EUVD

EUVD-2026-63645

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

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer overflow issue in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. A remote attacker could exploit it to cause a denial of service by sending specially crafted input that overflows a buffer, potentially crashing the system or disrupting services.

Detection Guidance

Detection requires checking for IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 versions and monitoring for buffer overflow indicators. Use system commands like oslevel to verify AIX versions and ioslevel for VIOS. Check logs for unusual network traffic or crashes.

Impact Analysis

The impact includes system crashes or service disruptions due to a denial of service. This could lead to downtime for critical applications or services running on affected IBM AIX or PowerVM VIOS systems.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The vulnerability involves a denial of service due to a buffer overflow in IBM AIX and PowerVM VIOS, but no direct impact on regulatory compliance is mentioned.

Mitigation Strategies

Apply IBM-provided patches or updates for AIX 7.2, 7.3, and PowerVM VIOS 4.1 to address the buffer overflow issue. Monitor IBM security advisories for updates and restrict remote access to affected systems until patched.

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