CVE-2026-17271
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Denial of Service in IBM i Due to Input Validation Flaw

Publication date: 2026-08-12

Last updated on: 2026-08-12

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.

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Meta Information

Published
2026-08-12
Last Modified
2026-08-12
Generated
2026-08-13
AI Q&A
2026-08-12
EPSS Evaluated
N/A
NVD
CVE-2026-17271
EUVD
EUVD-2026-57385

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
ibm i 7.6
ibm i 7.5
ibm i 7.4
ibm i 7.3

Helpful Resources

Exploitability

CWE
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KEV
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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.

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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.

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.

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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