CVE-2026-17271

Analyzed Analyzed - Analysis Complete

Denial of Service in IBM i Due to Input Validation Flaw

Publication date: 2026-08-12

Last updated on: 2026-08-17

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 improper validation of input size.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-12

Last Modified

2026-08-17

Generated

2026-09-02

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-31

NVD

CVE-2026-17271

EUVD

EUVD-2026-57385

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	From 7.3 (inc) to 7.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM i versions 7.6, 7.5, 7.4, and 7.3 allows a remote attacker to cause a denial of service by sending input that is not properly validated for size.

Detection Guidance

This vulnerability involves improper input validation leading to a denial of service. Detection requires monitoring for unusual network traffic or system crashes targeting IBM i systems. Check for excessive resource usage or failed input validations in system logs. No specific commands are provided in the CVE details.

Impact Analysis

It could lead to system unavailability or degraded performance, disrupting normal operations for users and services relying on the affected IBM i systems.

Compliance Impact

This vulnerability could lead to a denial of service, potentially disrupting systems handling sensitive data. While not directly violating GDPR or HIPAA, such disruptions may impact availability requirements, which are part of both regulations. Organizations must ensure robust security measures to prevent service interruptions that could affect compliance.

Mitigation Strategies

Apply IBM i PTFs or updates to address improper input validation. Monitor network traffic for unusual patterns that may indicate denial of service attempts. Restrict access to IBM i systems from untrusted networks.

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