CVE-2026-17259

Received Received - Intake

Stack-Based Buffer Overflow in IBM i

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to cause a denial of service due to a stack-based buffer overflow.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-04

Last Modified

2026-09-04

Generated

2026-09-05

AI Q&A

2026-09-05

EPSS Evaluated

N/A

NVD

CVE-2026-17259

EUVD

EUVD-2026-71479

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.6
ibm	i	7.5
ibm	i	7.4
ibm	i	7.3

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 i versions 7.6, 7.5, 7.4, and 7.3. A remote authenticated attacker could exploit it to cause a denial of service by sending specially crafted input that overflows a buffer on the stack.

Impact Analysis

The vulnerability allows an attacker to disrupt services by crashing the affected system. This could lead to downtime, loss of availability for critical applications, and potential data access issues if the system becomes unresponsive.

Mitigation Strategies

Apply IBM i PTFs or updates provided by IBM to address the stack-based buffer overflow issue. Ensure remote authenticated access is restricted and monitored.

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