CVE-2026-6051: IBM® Db2® is vulnerable to a denial of service when executing a specially crafted query with a small statement heap

Published May 27, 2026
·
Updated

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when executing a specially crafted query with a small statement heap.

Affected Software

7 affected components
All of the following
Any of the following
IBM DB2>=11.5.0<=11.5.9
IBM DB2>=12.1.0<=12.1.4
Any of the following
IBM AIX
IBM Linux On Ibm Z
Linux Linux kernel
Microsoft Windows
IBM IBM® Db2® on Cloud Pak for Data and Db2 Warehouse on Cloud Pak for Data<=v4.8 v5.0v5.1v5.2v5.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM Db2 to a version that resolves this vulnerability.

    Fixed in V11.5.9
  2. Upgrade

    Upgrade IBM Db2 to a version that resolves this vulnerability.

    Fixed in V12.1.4

Event History

May 27, 2026
CVE Published
via MITRE·01:07 PM
Data Sourced
via MITRE·01:07 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·02:17 PM
DescriptionSeverityWeaknessAffected Software
Jun 19, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-6051?

CVE-2026-6051 has a severity rating of high with a score of 7.5.

2

How do I fix CVE-2026-6051?

To address CVE-2026-6051, customers should download the special build containing the interim fix from Fix Central for their respective Db2 version.

3

What affected versions are impacted by CVE-2026-6051?

CVE-2026-6051 affects IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4.

4

What type of vulnerability is CVE-2026-6051?

CVE-2026-6051 is categorized as a denial of service vulnerability.

5

Is there a workaround for CVE-2026-6051?

Currently, the recommended approach for CVE-2026-6051 is to apply the interim fix provided by IBM, as no alternative workaround is mentioned.

Company

Resources

Contact

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