CVE-2026-6053: IBM® Db2® is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables

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 a specially crafted query is run with range partitioned tables.

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·01:10 PM
Data Sourced
via MITRE·01:10 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-2026-6053?

CVE-2026-6053 has a medium severity rating of 5.5.

2

What vulnerability does CVE-2026-6053 describe?

CVE-2026-6053 describes a denial of service vulnerability in IBM Db2 when handling specially crafted queries with range partitioned tables.

3

Which versions of IBM Db2 are affected by CVE-2026-6053?

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 are affected by CVE-2026-6053.

4

How do I fix CVE-2026-6053?

To fix CVE-2026-6053, download the special build with the interim fix from Fix Central for the affected Db2 versions.

5

What type of attack does CVE-2026-6053 enable?

CVE-2026-6053 enables a denial of service attack that impacts the availability of IBM Db2 databases.

Company

Resources

Contact

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