CVE-2025-36387: IBM Db2 Denial of Service

Published Jan 29, 2026
·
Updated

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.

Other sources

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow an authenticated user to cause a denial of service when given specially crafted query.

— IBM

Affected Software

5 affected components
IBM Db2 for Linux, UNIX and Windows>=11.5.0<=11.5.9
IBM IBM® Db2®<=11.5.0 - 11.5.9
IBM Db2 Linux>=11.5.0<=11.5.9
IBM Db2 Unix>=11.5.0<=11.5.9
IBM Db2 Windows>=11.5.0<=11.5.9

Remediation

Information

Customers running any vulnerable modpack level of an affected Program, V11.5 , can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release: V11.5.9. They can be applied to any affected level of the appropriate release to remediate this vulnerability.   ReleaseFixed in mod packAPARDownload URLV11.5TBD https://www.ibm.com/support/pages/node/7087189   IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Patch Available

https://www.ibm.com/support/pages/node/7257690

Event History

Jan 29, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Jan 30, 2026
CVE Published
via MITRE·09:27 PM
Data Sourced
via MITRE·09:27 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·10:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2025-36387?

CVE-2025-36387 is classified as a denial-of-service vulnerability that could impact the availability of IBM Db2 for Linux, UNIX, and Windows.

2

How do I fix CVE-2025-36387?

To address CVE-2025-36387, ensure you apply any available patches or updates provided by IBM for versions of Db2 affected by this vulnerability.

3

Who is affected by CVE-2025-36387?

CVE-2025-36387 affects authenticated users of IBM Db2 for Linux, UNIX, and Windows versions 11.5.0 to 11.5.9.

4

What type of attack does CVE-2025-36387 enable?

CVE-2025-36387 enables a denial-of-service attack that can be triggered by specially crafted queries.

5

Is CVE-2025-36387 specific to any operating system?

CVE-2025-36387 is specific to the IBM Db2 product on Linux, UNIX, and Windows operating systems.

Company

Resources

Contact

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