CVE-2026-16911

Analyzed Analyzed - Analysis Complete

Stack Buffer Overflow in IBM AIX and PowerVM VIOS

Publication date: 2026-08-19

Last updated on: 2026-08-21

Assigner: IBM Corporation

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to execute arbitrary code due to a stack buffer overflow.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-21

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-16911

EUVD

EUVD-2026-62831

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	vios	From 4.1.0 (inc) to 4.1.0.50 (exc)
ibm	vios	From 4.1.1.0 (inc) to 4.1.1.30 (exc)
ibm	vios	From 4.1.2.0 (inc) to 4.1.2.20 (exc)
ibm	aix	From 7.2.5 (inc) to 7.2.5.212 (inc)
ibm	aix	From 7.3.2 (inc) to 7.3.2.5 (inc)
ibm	aix	From 7.3.3 (inc) to 7.3.3.2 (inc)
ibm	aix	From 7.3.4 (inc) to 7.3.4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This is a stack buffer overflow vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. A remote authenticated attacker could exploit this to execute arbitrary code on the affected system.

Detection Guidance

This vulnerability involves a stack buffer overflow in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1. Detection requires checking system versions and applying IBM's official patches or updates. No specific commands are provided in the context to directly detect this issue.

Impact Analysis

An attacker could gain control of the system, steal data, install malware, or disrupt operations. This requires remote access and authentication, but could lead to severe system compromise.

Compliance Impact

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

Mitigation Strategies

Apply IBM-provided patches or updates for AIX 7.2, 7.3, and PowerVM VIOS 4.1 immediately. Isolate affected systems if possible and restrict remote authenticated access until patched.

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