CVE-2026-7771
Received Received - Intake

Denial of Service in IBM Db2 Database

Publication date: 2026-07-17

Last updated on: 2026-07-17

Assigner: IBM Corporation

Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a trap when compiling a specially crafted statements containing subqueries could lead to a denial of service.

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Meta Information

Published
2026-07-17
Last Modified
2026-07-17
Generated
2026-07-18
AI Q&A
2026-07-17
EPSS Evaluated
N/A
NVD
CVE-2026-7771
EUVD
EUVD-2026-45283

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ibm db2 From 11.5.0 (inc) to 11.5.9 (inc)
ibm db2 From 12.1.0 (inc) to 12.1.4 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-835 The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

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Executive Summary

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 are vulnerable to a trap when compiling specially crafted statements containing subqueries. This could lead to an infinite loop or crash, resulting in a denial of service.

Detection Guidance

IBM does not disclose detailed exploitation steps to prevent misuse. Detection may involve monitoring for unexpected database crashes or infinite loops during query compilation. Check IBM Db2 logs for trap events or unusual query patterns involving subqueries.

Impact Analysis

This vulnerability could cause your IBM Db2 database to become unresponsive or crash when processing malicious queries. This disrupts database operations, leading to downtime and potential loss of access to critical data.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it is a denial of service issue in IBM Db2. However, if exploited, it could disrupt database availability, potentially impacting data access required for compliance audits or processing.

Mitigation Strategies

Apply interim fixes provided by IBM through Fix Central for the most recent levels of affected Db2 versions (11.5.0-11.5.9 and 12.1.0-12.1.4). Ensure proper application of query predicates to avoid crafted statements triggering the vulnerability.

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