IBM Db2 Denial-of-Service Vulnerability Due to Improper Resource Allocation

Vulnerability

A denial-of-service vulnerability has been identified in IBM Db2 for Linux, UNIX, and Windows, including Db2 Connect Server, versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.3. This vulnerability could allow an authenticated user to cause a denial-of-service condition by improperly allocating resources.

Impact

Exploitation of this vulnerability can lead to a denial-of-service condition, causing the application to become unresponsive or unavailable.

Remediation

Users can download a special build containing the interim fix for this issue from Fix Central. For Db2 version 11.5, the special build #66394 or later is available. For Db2 version 12.1, the special build #72296 or later can be downloaded. Instructions for accessing these special builds are available on the IBM Support website.

Added: Jan 30, 2026, 10:34 PM
Updated: Jan 30, 2026, 10:34 PM

Vulnerability Rating

Custom Algorithm
spread
5.7
impact
2.5
exploitability
3.5
remediation
7.7
relevance
2.5
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.