CVE-2026-17485

Analyzed Analyzed - Analysis Complete

Integer Underflow in IBM i Leading to DoS and Information Disclosure

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 and obtain sensitive information due to an integer underflow.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-12

Last Modified

2026-08-17

Generated

2026-09-02

AI Q&A

2026-08-13

EPSS Evaluated

2026-08-31

NVD

CVE-2026-17485

EUVD

EUVD-2026-57599

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.3
ibm	i	7.4
ibm	i	7.5
ibm	i	7.6

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.
CWE-191	The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer underflow issue in IBM i versions 7.6, 7.5, 7.4, and 7.3. It allows a remote attacker to cause a denial of service and potentially access sensitive information by exploiting the integer underflow condition.

Detection Guidance

This vulnerability is specific to IBM i systems and involves an integer underflow leading to denial of service and potential information disclosure. Detection requires checking IBM i system logs for unusual network activity or crashes. Use IBM i commands like DSPLOG to review system logs for errors related to network services or unexpected terminations. Monitor network traffic for anomalies using tools like tcpdump or Wireshark on the IBM i system.

Impact Analysis

The impact includes system disruption due to denial of service and possible exposure of sensitive data. The high CVSS score of 8.2 indicates significant risk as it can be exploited remotely without authentication.

Compliance Impact

The vulnerability could lead to denial of service and exposure of sensitive information due to an integer underflow, which may impact compliance with GDPR (data confidentiality) and HIPAA (availability and integrity of protected health information).

Mitigation Strategies

Apply IBM i PTFs or updates provided for versions 7.6, 7.5, 7.4, and 7.3 to address the integer underflow issue. Monitor IBM PSIRT advisories for patches and restrict remote access to affected systems until updates are applied.

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