What is CVE-2020-4420?

CVE-2020-4420 is a high-severity vulnerability in IBM Db2, classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2020-07-01.

How severe is CVE-2020-4420?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in IBM Db2

CVE-2020-4420

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow an unauthenticated attacker to cause a denial of service due a hang in the execution of a terminate command. IBM X-Force ID: 180076.

Published 2020-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

IBM Db2 — versions 9.7.0.0, 10.1.0.0, 10.5.0.0
IBM Db2 For Linux- Unix And Windows — versions 9.7, 10.1, 10.5
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

www.ibm.com/support/pages/node/6242362 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/180076 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4420?: CVE-2020-4420 is a high-severity vulnerability in IBM Db2, classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2020-07-01.
How severe is CVE-2020-4420?: High severity. CVSS v3 base score is 7.5 out of 10.