CVE-2025-36009 | IBM Db2 Denial of Service

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow an authenticated user to cause a denial of service due to excessive use of a global variable.

Published: 2026-01-30 Last update: 2026-02-11 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-36009 is rated Low Risk (35.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.34%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-36009

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.34% +0.32%
2 2026-01-31 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-36009

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2025-36009

Affected software / configurations for CVE-2025-36009

Vendor Product Version Raw CPE
ibm db2 >= 11.5.0, <= 11.5.9 cpe:2.3:a:ibm:db2:*:*:*:*:*:linux:*:*
ibm db2 >= 11.5.0, <= 11.5.9 cpe:2.3:a:ibm:db2:*:*:*:*:*:unix:*:*
ibm db2 >= 11.5.0, <= 11.5.9 cpe:2.3:a:ibm:db2:*:*:*:*:*:windows:*:*
ibm db2 >= 12.1.0, <= 12.1.3 cpe:2.3:a:ibm:db2:*:*:*:*:*:linux:*:*
ibm db2 >= 12.1.0, <= 12.1.3 cpe:2.3:a:ibm:db2:*:*:*:*:*:unix:*:*
ibm db2 >= 12.1.0, <= 12.1.3 cpe:2.3:a:ibm:db2:*:*:*:*:*:windows:*:*

References for CVE-2025-36009

cvelogic Threat Intelligence