CVE-2026-17229
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Denial of Service in IBM i via Infinite Loop

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 an infinite loop.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-14
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-17229
EUVD
EUVD-2026-58233

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
ibm i 7.6
ibm i 7.5
ibm i 7.4
ibm i 7.3
ibm i From 7.6 (inc)
ibm i From 7.5 (inc)
ibm i From 7.4 (inc)
ibm i From 7.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-835 The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

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Executive Summary

This vulnerability in IBM i 7.6, 7.5, 7.4, and 7.3 allows a remote attacker to cause a denial of service by triggering an infinite loop. This can exhaust system resources and make services unavailable.

Detection Guidance

This vulnerability may cause system unresponsiveness or high CPU usage due to an infinite loop. Monitor for unusual CPU spikes, network timeouts, or service disruptions on IBM i systems running versions 7.6, 7.5, 7.4, or 7.3.

Impact Analysis

The impact includes service disruption, as the infinite loop consumes CPU and memory, leading to degraded performance or complete unavailability of affected systems.

Compliance Impact

This vulnerability could lead to a denial of service, which may impact availability of systems. For GDPR, availability is part of data integrity and security principles, so prolonged outages could pose compliance risks. HIPAA requires ensuring availability of ePHI, so disruptions may affect compliance if systems storing or processing such data are impacted.

Mitigation Strategies

Apply IBM-provided PTFs or updates for your IBM i version. Isolate affected systems from the network if possible. Monitor IBM i support channels for official patches addressing the infinite loop issue.

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