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Fencer Vulns
high 7.8

CVE-2018-14424 json

The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows…

published 2018-08-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6341

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution.

Patch / fix

  • gdm3 Debian 14, Debian 13, Debian 12 3.28.2-4

debian advisories DEBIAN-CVE-2018-14424

  • gdm3 Ubuntu 18.04 LTS 3.28.2-0ubuntu1.4

ubuntu advisories UBUNTU-CVE-2018-14424

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

  • gdm SLE Module for Desktop Applications 15 3.26.2.1-13.9.1
  • gdm SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +1 more 3.10.0.1-54.6.3

suse advisories SUSE-SU-2018:2771-1SUSE-SU-2018:2527-1

  • gdm openSUSE Tumbleweed 3.38.2-2.7

opensuse advisories openSUSE-SU-2024:10780-1

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-2018-14424 updated cvss 7.3

gdm: use-after-free in the GDM daemon

  • Red Hat Enterprise Linux 7 gdm
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 6 gdm, gdm-libs, gdm-plugin-smartcard, gdm-plugin-fingerprint, gdm-user-switch-applet Red Hat Enterprise Linux 8 gdm
    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

0.54% chance of exploitation in the next 30 days, higher than 45% 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.