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Fencer Vulns
high 7.8

CVE-2018-18718 json

An issue was discovered in gThumb through 3.6.2.

published 2018-10-28 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10434

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

An issue was discovered in gThumb through 3.6.2. There is a double-free vulnerability in the add_themes_from_dir method in dlg-contact-sheet.c because of two successive calls of g_free, each of which frees the same buffer.

Patch / fix

  • gthumb Debian 14, Debian 13, Debian 12 3:3.6.2-2

debian advisories DEBIAN-CVE-2018-18718

  • gthumb Ubuntu Pro 16.04 LTS 3:3.4.3-1ubuntu0.1~esm1
  • gthumb Ubuntu Pro 18.04 LTS 3:3.6.1-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-18718

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gthumb openSUSE Tumbleweed 3.12.0-3.1
  • gthumb Package Hub 15, openSUSE Leap 15.0 3.6.1-bp150.2.3.1

opensuse advisories openSUSE-SU-2024:10832-1openSUSE-SU-2019:0022-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-18718 updated cvss 3.3

gthumb: double-free in the add_themes_from_dir method in dlg-contact-sheet.c

  • Red Hat Enterprise Linux 5 gthumb Red Hat Enterprise Linux 6 gthumb
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.