What is CVE-2020-4642?

CVE-2020-4642 is a medium-severity vulnerability in IBM Db2. CVSS score: 5.5/10. Published 2020-12-23.

How severe is CVE-2020-4642?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in IBM Db2

CVE-2020-4642

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow local attacker to cause a denial of service inside the "DB2 Management Service".

Published 2020-12-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

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

References

www.ibm.com/support/pages/node/6391652 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/185589 (VDB Entry, vdb-entry, Vendor Advisory)
security.netapp.com/advisory/ntap-20210129-0009/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-4642?: CVE-2020-4642 is a medium-severity vulnerability in IBM Db2. CVSS score: 5.5/10. Published 2020-12-23.
How severe is CVE-2020-4642?: Medium severity. CVSS v3 base score is 5.5 out of 10.