What is CVE-2018-1977?

CVE-2018-1977 is a medium-severity vulnerability in IBM Db2, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-12-14.

How severe is CVE-2018-1977?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in IBM Db2

CVE-2018-1977

IBM DB2 for Linux, UNIX and Windows 11.1 (includes DB2 Connect Server) contains a denial of service vulnerability. A remote, authenticated DB2 user could exploit this vulnerability by issuing a specially-crafted SELECT statement with TRUNCATE function. IBM X-Force ID: 154032.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-12-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

IBM Db2 — versions 11.1
IBM Db2 For Linux, Unix And Windows — versions 11.1
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/106222 (VDB Entry, Third Party Advisory, vdb-entry)
exchange.xforce.ibmcloud.com/vulnerabilities/154032 (VDB Entry, vdb-entry, Vendor Advisory)
www.ibm.com/support/docview.wss (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-1977?: CVE-2018-1977 is a medium-severity vulnerability in IBM Db2, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-12-14.
How severe is CVE-2018-1977?: Medium severity. CVSS v3 base score is 5.3 out of 10.