Buffer Overflow in IBM i PASE Process Causes Denial of Service

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a denial of service as a result of a buffer overflow in a PASE process. An authenticated attacker could leverage this to terminate their own process.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-14

Last Modified

2026-09-14

Generated

2026-09-15

AI Q&A

2026-09-15

EPSS Evaluated

N/A

NVD

CVE-2026-19086

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	ibm_i	From 7.6 (inc)
ibm	ibm_i	From 7.5 (inc)
ibm	ibm_i	From 7.4 (inc)
ibm	ibm_i	From 7.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is a denial of service vulnerability in IBM i operating systems (versions 7.6, 7.5, 7.4, and 7.3). It occurs due to a buffer overflow in a PASE process, which could allow an authenticated attacker to terminate their own process.

Impact Analysis

An authenticated attacker could exploit this to disrupt their own processes, leading to temporary unavailability of services or applications running on the affected IBM i system.

Mitigation Strategies

Apply IBM i PTFs or updates to address the buffer overflow in PASE processes. Monitor for unusual process terminations and restrict authenticated user access to reduce attack surface.

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