CVE-2025-36407: IBM Db2 Denial of Service
Published Jan 29, 2026
·Updated
IBM® Db2® is vulnerable to a denial of service with a specially crafted query that uses ALTER TABLE operations.
Affected Software
9 affected components
IBM Db2 for Linux, UNIX and Windows>=11.5.0<=11.5.9, >=12.1.0<=12.1.3
IBM IBM® Db2®<=11.5.0 - 11.5.9
IBM IBM® Db2®<=12.1.0 - 12.1.3
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
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, V11.5, and 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: V11.5.9, 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 URLV11.5TBD https://www.ibm.com/support/pages/node/7087189
V12.1TBD 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
Event History
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
Feb 17, 2026
Data Sourced
via IBM·09:55 PM
DescriptionAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2025-36407?
CVE-2025-36407 has been classified as a medium severity vulnerability.
2
How do I fix CVE-2025-36407?
To fix CVE-2025-36407, it is recommended to apply the latest security patches from IBM for affected versions.
3
What versions of IBM Db2 are affected by CVE-2025-36407?
CVE-2025-36407 affects IBM Db2 for Linux, UNIX and Windows versions 11.5.0 to 11.5.9 and 12.1.0 to 12.1.3.
4
What type of attack does CVE-2025-36407 facilitate?
CVE-2025-36407 could allow a local user to cause a denial of service.
5
Is CVE-2025-36407 a remote vulnerability?
CVE-2025-36407 is not a remote vulnerability; it requires local access to exploit.