CVE-2026-18078
Received Received - Intake

Integer Overflow in IBM i Leading to Denial of Service

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: IBM Corporation

Description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to cause a denial of service due to an integer overflow.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-18078
EUVD
EUVD-2026-71460

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-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

This vulnerability is a denial of service issue in IBM i versions 7.6, 7.5, 7.4, and 7.3 caused by a remote authenticated attacker exploiting an integer overflow. This can lead to system instability or unavailability.

Detection Guidance

This vulnerability is specific to IBM i systems and requires detection through system monitoring and log analysis. Check for unusual system resource consumption or crashes on IBM i 7.6, 7.5, 7.4, or 7.3. Monitor network traffic for signs of remote authenticated attackers exploiting the integer overflow condition.

Impact Analysis

If exploited, this vulnerability could allow an attacker to disrupt services, causing downtime or reduced performance for systems running affected IBM i versions. It requires remote authenticated access, limiting impact to authorized users.

Compliance Impact

This vulnerability causes a denial of service due to an integer overflow, which could disrupt system availability. For compliance standards like GDPR and HIPAA, availability is a key requirement. Disruptions could potentially lead to violations if systems storing or processing sensitive data become unavailable, impacting data access or processing timelines.

Mitigation Strategies

Apply the latest IBM i PTFs or updates provided by IBM to address the integer overflow issue. Monitor IBM security advisories for patches and restrict remote access to trusted users until updates are applied.

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