CVE-2026-16660

Analyzed Analyzed - Analysis Complete

Denial of Service in IBM Db2 Mirror for i

Publication date: 2026-09-04

Last updated on: 2026-09-10

Assigner: IBM Corporation

Description

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-04

Last Modified

2026-09-10

Generated

2026-09-25

AI Q&A

2026-09-05

EPSS Evaluated

2026-09-24

NVD

CVE-2026-16660

EUVD

EUVD-2026-71488

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	db2_mirror_for_i	From 7.4 (inc) to 7.6 (inc)

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.

Attack-Flow Graph

Executive Summary

IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6 contain an out-of-bounds read vulnerability. This flaw allows a remote attacker to cause a denial of service by sending specially crafted data to the affected system.

Detection Guidance

Detection of CVE-2026-16660 requires checking for IBM Db2 Mirror for i versions 7.4, 7.5, or 7.6 and verifying if the latest PTF fixes are applied. Use IBM i commands like DSPPTF to list installed PTFs and compare against the fixes mentioned in the IBM support page.

Impact Analysis

This vulnerability could allow an attacker to disrupt the availability of IBM Db2 Mirror for i services, leading to system downtime or degraded performance. It does not directly expose data but may impact business operations relying on the database.

Compliance Impact

The vulnerability (CVE-2026-16660) is an out-of-bounds read issue in IBM Db2 Mirror for i that could allow a remote attacker to cause a denial of service. This type of denial-of-service vulnerability may impact system availability, which is a critical requirement under compliance standards like GDPR (Article 32) and HIPAA (Security Rule).

Mitigation Strategies

Apply the latest IBM Db2 Mirror for i patches or updates provided by IBM to address the out-of-bounds read vulnerability. Monitor IBM's security advisories for fixes and ensure network segmentation to limit exposure.

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