What is CVE-2020-5025?

CVE-2020-5025 is a high-severity vulnerability in IBM Db2, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2021-03-11.

How severe is CVE-2020-5025?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in IBM Db2

CVE-2020-5025

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 db2fm is vulnerable to a buffer overflow, caused by improper bounds checking which could allow a local attacker to execute arbitrary code on the system with root privileges. IBM X-Force ID: 193661.

Vulnerability class: Buffer Overflow

Published 2021-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

IBM Db2 — versions 9.7, 10.1, 10.5
IBM Db2 For Linux, Unix And Windows — versions 10.5, 10.1, 9.7
Linux Kernel
Microsoft Windows
NetApp Oncommand Insight

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.ibm.com/support/pages/node/6427855 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/193661 (VDB Entry, vdb-entry, Vendor Advisory)
security.netapp.com/advisory/ntap-20210409-0003/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-5025?: CVE-2020-5025 is a high-severity vulnerability in IBM Db2, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2021-03-11.
How severe is CVE-2020-5025?: High severity. CVSS v3 base score is 7.8 out of 10.