Stack-Based Buffer Overflow in IBM i

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: IBM Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-13

Last Modified

2026-08-13

Generated

2026-08-14

AI Q&A

2026-08-14

EPSS Evaluated

N/A

NVD

CVE-2026-18077

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

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 attacker could exploit this 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 crash the affected IBM i system, leading to service disruption. Since it is remotely exploitable without authentication, it poses a significant risk to system availability.

Mitigation Strategies

Apply the latest IBM i PTF or update to a patched version of IBM i 7.6, 7.5, 7.4, or 7.3 to address the stack-based buffer overflow vulnerability.

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