CVE-2009-4439: n/a vulnerability

CVE-2009-4439: Unspecified vulnerability in the Query Compiler, Rewrite, and Optimizer component in IBM DB2 9.5 before FP5...

Unspecified vulnerability in the Query Compiler, Rewrite, and Optimizer component in IBM DB2 9.5 before FP5 allows remote authenticated users to cause a denial of service (instance crash) by compiling a SQL query.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 18:59 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2009-4439 is an IBM DB2 9.5 denial-of-service issue. An authenticated remote user could compile a SQL query that crashes the DB2 instance. This threatens database availability, not data theft based on available sources. Systems still running DB2 9.5 before Fix Pack 5 should be treated as exposed. Exposure is most likely where IBM DB2 9.5 before FP5 is still deployed and reachable by authenticated database users or applications. Internet exposure is not required; internal users or compromised application credentials could be relevant. Prioritize if legacy DB2 9.5 supports important business applications. The risk is service outage from authenticated access, so urgency depends on database criticality, user population, and whether the instance remains below FP5. Mitigation focus: Identify IBM DB2 9.5 deployments and current Fix Pack levels.; Upgrade affected DB2 9.5 instances to Fix Pack 5 or later, where applicable.; Review IBM advisory/APAR guidance for environment-specific prerequisites and support status..

Prepared: Jun 28, 2026, 11:12 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 28, 2009, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

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Weakness

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