The Common Code Infrastructure component in IBM DB2 9.5 before FP5 and 9.7 before FP1 does not properly validate the size of a memory pool during a creation attempt, which allows attackers to cause a denial of service (memory consumption) via unspecified vectors.
Conclusion & alert: CVE-2009-4327 is rated Moderate Risk (49.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.35%). Core evidence: EPSS rose +1.31% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.04% | 2.35% | +1.31% |
| 2 | 2025-03-30 | 1.39% | 1.04% | -0.35% |
| 3 | 2025-03-29 | — | 1.39% | — |
Full EPSS history (12 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:*:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp1:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp2:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp2a:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp3:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp3a:*:*:*:*:*:* |
| ibm | db2 | 9.5 | cpe:2.3:a:ibm:db2:9.5:fp3b:*:*:*:*:*:* |
| ibm | db2 | 9.7 | cpe:2.3:a:ibm:db2:9.7:*:*:*:*:*:*:* |