IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.

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Advisories

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Fixes

Solution

Customers running any vulnerable affected 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, and V12.1.4. 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 V12.1 TBD https://www.ibm.com/support/pages/node/7267513 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.


Workaround

Set the following registry variable to avoid SORT operations that are used for some JOIN optimization techniques: db2set -im DB2_REDUCED_OPTIMIZATION="NO_SORT_NLJOIN,NO_SORT_MGJOIN"

History

Thu, 23 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 23 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
Description IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.
Title IBM® Db2® is vulnerable to a trap or return SQLCODE -901 when compiling a specially crafted query with a defined index
First Time appeared Ibm
Ibm db2
Weaknesses CWE-1284
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:db2:12.1.4:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm db2
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-04-23T13:57:34.912Z

Reserved: 2026-01-22T17:35:12.277Z

Link: CVE-2026-1352

cve-icon Vulnrichment

Updated: 2026-04-23T13:57:31.531Z

cve-icon NVD

Status : Received

Published: 2026-04-23T00:16:44.753

Modified: 2026-04-23T00:16:44.753

Link: CVE-2026-1352

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses