How severe is CVE-2009-4439?

CVE-2009-4439 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2009-4439 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4439?

CVE-2009-4439 primarily affects Ibm Db2. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4439?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-4439 published?

CVE-2009-4439 was published on 2009-12-28 and last updated on 2026-06-16.

CVE-2009-4439

CVE-2009-4439 is a medium-severity vulnerability in Ibm Db2 with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Db2
Published: 2009-12-28
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2009-4439?: 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.
How severe is CVE-2009-4439?: CVE-2009-4439 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2009-4439 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4439?: CVE-2009-4439 primarily affects Ibm Db2. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4439 published?: CVE-2009-4439 was published on 2009-12-28 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:ibm:db2:9.5:fp1:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp2:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp2a:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp3:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp3a:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp3b:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp4:*:*:*:*:*:*
cpe:2.3:a:ibm:db2:9.5:fp4a:*:*:*:*:*:*

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