Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables.
Published: 2026-05-27
Score: 5.5 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 contain a vulnerability that can cause a denial of service when a specially crafted query targets range‑partitioned tables. The flaw is identified as an out‑of‑memory condition (CWE‑770) that can lead the database to become unresponsive or crash, thereby interrupting availability for the affected databases and any dependent applications.

Affected Systems

The affected systems are IBM Db2 products running any level of the 11.5 or 12.1 releases, specifically up to and including 11.5.9 and 12.1.4. Any database instance that uses range partitioned tables and is running one of these releases is at risk.

Risk and Exploitability

The CVSS score of 5.5 indicates a medium severity impact, and the EPSS score is not available. The vulnerability is not listed in the CISA KEV catalog. Based on the description, it is inferred that an attacker who can submit queries to the database—such as a privileged user or a remote client with query permissions—could trigger the denial of service. The exploit would rely on executing a specially crafted query against a range‑partitioned table, causing an out‑of‑memory error and service disruption.

Generated by OpenCVE AI on May 27, 2026 at 17:48 UTC.

Remediation

Vendor 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.

Vendor Workaround

Turn off intra-parallelism. Ensure sufficient memory available in the application heap to avoid memory allocation from failing.

OpenCVE Recommended Actions

  • Download and install the IBM special build for Db2 11.5.9 to remediate the issue in all 11.5 levels
  • Download and install the IBM special build for Db2 12.1.4 to remediate the issue in all 12.1 levels
  • Configure the database to turn off intra‑parallelism to avoid the memory allocation failure path
  • Ensure the application heap has sufficient memory allocated to prevent allocation failures during query execution

Generated by OpenCVE AI on May 27, 2026 at 17:48 UTC.

Tracking

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Advisories

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History

Wed, 27 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables.
Title IBM® Db2® is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables
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:db2:12.1.4:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm db2
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Ibm Db2
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-05-27T13:10:05.402Z

Reserved: 2026-04-09T22:16:06.393Z

Link: CVE-2026-6053

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-27T14:17:34.633

Modified: 2026-05-27T14:53:51.833

Link: CVE-2026-6053

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-27T18:00:15Z

Weaknesses