CVE-2026-16877

Received Received - Intake

Stack-Based Buffer Overflow in IBM AIX and PowerVM VIOS

Publication date: 2026-08-19

Last updated on: 2026-08-19

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-based buffer overflow.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-16877

EUVD

EUVD-2026-62872

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-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-based buffer overflow vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. A remote authenticated attacker could exploit it to execute arbitrary code on the affected system.

Impact Analysis

An attacker could gain control of the system, leading to unauthorized access, data theft, or disruption of services. The high CVSS score indicates significant risk.

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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