What is CVE-2018-7409?

CVE-2018-7409 is a critical-severity vulnerability in Unixodbc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-02-22.

How severe is CVE-2018-7409?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Unixodbc

CVE-2018-7409

In unixODBC before 2.3.5, there is a buffer overflow in the unicode_to_ansi_copy() function in DriverManager/__info.c.

Vulnerability class: Buffer Overflow

Published 2018-02-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Unixodbc

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.unixodbc.org/unixODBC-2.3.5.tar.gz (Product)
sourceforge.net/projects/unixodbc/files/unixODBC/2.3.5/ChangeLog/download (Release Notes)
access.redhat.com/errata/RHSA-2019:2336 (vendor-advisory)

Frequently asked questions

What is CVE-2018-7409?: CVE-2018-7409 is a critical-severity vulnerability in Unixodbc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-02-22.
How severe is CVE-2018-7409?: Critical severity. CVSS v3 base score is 9.8 out of 10.