What is CVE-2018-12422?

CVE-2018-12422 is a critical-severity vulnerability in GNOME Evolution, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-06-15.

How severe is CVE-2018-12422?

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

Buffer overflow in GNOME Evolution

CVE-2018-12422

addressbook/backends/ldap/e-book-backend-ldap.c in Evolution-Data-Server in GNOME Evolution through 3.29.2 might allow attackers to trigger a Buffer Overflow via a long query that is processed by the strcat function. NOTE: the software maintainer disputes this because "the code had computed the required string length first, and then allocated a large-enough buffer on the heap.

Vulnerability class: Buffer Overflow

Published 2018-06-15 · 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: 0.018 (78.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

GNOME Evolution

Weakness classification (CWE)

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

References

bugzilla.gnome.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
gitlab.gnome.org/GNOME/evolution-data-server/commit/34bad6173 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-12422?: CVE-2018-12422 is a critical-severity vulnerability in GNOME Evolution, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-06-15.
How severe is CVE-2018-12422?: Critical severity. CVSS v3 base score is 9.8 out of 10.