CVE-2026-104332
Received Received - Intake

Denial of Service in IBM Db2 via Materialized Query Table

Publication date: 2026-10-12

Last updated on: 2026-10-12

Assigner: IBM Corporation

Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to a denial of service when executing a specially crafted query with a Materialized Query Table

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Meta Information

Published
2026-10-12
Last Modified
2026-10-12
Generated
2026-10-13
AI Q&A
2026-10-12
EPSS Evaluated
N/A
NVD
CVE-2026-104332
EUVD
EUVD-2026-97784

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
IBM Db2 11.5.0
IBM Db2 12.1.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 are vulnerable to a denial of service (DoS) when executing a specially crafted query involving a Materialized Query Table (MQT). This vulnerability is a stack-based buffer overflow that can cause the system to crash or become unresponsive.

Detection Guidance

Detection involves checking the installed Db2 version and applying IBM's security updates. Use 'db2level' to verify the version and compare it against affected ranges (11.5.0-11.5.9, 12.1.0-12.1.5). Apply patches from IBM Fix Central if vulnerable.

Impact Analysis

This vulnerability can lead to system downtime and disruption of services relying on IBM Db2. Attackers could exploit it to cause a DoS, making databases unavailable and potentially leading to data access issues or loss of functionality.

Compliance Impact

A successful DoS attack could result in prolonged downtime, violating availability requirements in GDPR and HIPAA. This may lead to non-compliance, potential fines, and reputational damage due to disrupted access to critical data.

Mitigation Strategies

Apply the security updates released by IBM for Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. These fixes are available via IBM Fix Central. No workarounds are provided, so updating is the only recommended mitigation.

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