CVE-2025-36423: IBM Db2 Denial of Service

Published Jan 29, 2026
·
Updated

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 12.1.0 - 12.1.3 could allow a local user to cause a denial of service due to improper neutralization of special elements in data query logic.

Other sources

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a local user to cause a denial of service due to improper neutralization of special elements in data query logic.

— IBM

Affected Software

5 affected components
IBM Db2 for Linux, UNIX and Windows>=12.1.0<=12.1.3
IBM IBM® Db2®<=12.1.0 - 12.1.3
IBM Db2 Linux>=12.1.0<=12.1.3
IBM Db2 Unix>=12.1.0<=12.1.3
IBM Db2 Windows>=12.1.0<=12.1.3

Remediation

Information

Customers running any vulnerable modpack level of an affected Program, V12.1, 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: V12.1.2 and V12.1.3. They can be applied to any affected level of the appropriate release to remediate this vulnerability.   ReleaseFixed in mod packAPARDownload URLV12.1TBD https://www.ibm.com/support/pages/db2-v1212-published-cumulative-special-build-downloads Special Build #71609 or later for V12.1.3 available at this link: https://www.ibm.com/support/pages/db2-v1213-published-cumulative-special-build-downloads

Patch Available

https://www.ibm.com/support/pages/node/7257694

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-2025-36423?

CVE-2025-36423 has been classified as a denial of service vulnerability affecting IBM Db2 versions 12.1.0 to 12.1.3.

2

How do I fix CVE-2025-36423?

To mitigate CVE-2025-36423, users should apply any available patches or updates provided by IBM for affected Db2 versions.

3

Who is affected by CVE-2025-36423?

Local users of IBM Db2 for Linux, UNIX, and Windows versions 12.1.0 to 12.1.3 are affected by CVE-2025-36423.

4

What kind of attack does CVE-2025-36423 involve?

CVE-2025-36423 involves a denial of service attack due to improper neutralization of special elements in data query logic.

5

Is CVE-2025-36423 remotely exploitable?

CVE-2025-36423 is not remotely exploitable and requires local access to the system to trigger the denial of service.

Company

Resources

Contact

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