CVE-2025-36136

IBM denial of service

Published Nov 7, 2025 CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to cause a denial of service due to the database monitor script incorrectly detecting that the instance is still starting under specific conditions.

Remediation

Vendor Solution

Remediation/Fixes 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. Release Fixed in mod pack APAR Download URL V11.5 TBD DT435369 Special Build #69673 or later for V11.5.9 available at this link: https://www.ibm.com/support/pages/node/7087189 V12.1 V12.1.3 DT435369 Special Build #70120 or later for V12.1.2 available at this link: https://www.ibm.com/support/pages/db2-v1212-published-cumulative-special-build-downloads 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. Note: After December 31, 2025, 11.1 and 10.5 versions of Db2 will not have security fixes made available as they will reach EoS.


Vendor Workaround

Workarounds and Mitigations Ensure there is no other process that may be accessing or viewing the db2V115_start.ksh script by it's full path, or that has the instance name in it's command line with the script for any reason.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:ibm:db2:*:*:*:*:*:linux:*:*
cpe:2.3:a:ibm:db2:*:*:*:*:*:unix:*:*
cpe:2.3:a:ibm:db2:*:*:*:*:*:windows:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to cause a denial of service due to the database monitor script incorrectly detecting that the instance is still starting under specific conditions.
Title IBM denial of service
First Time appeared Ibm
Ibm db2
Weaknesses CWE-770
CPEs cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:12.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:12.1.3:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm db2
References
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Nov 7, 2025, 6:53 PM
Reserved
Apr 15, 2025, 9:16 PM
Status
Analyzed
Published
Nov 7, 2025, 7:16 PM
Modified
Oct 7, 2026, 9:10 PM