CVE-2019-3825
gdm: lock screen bypass when timed login is enabled
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · February 6, 2019
Updated · February 24, 2026
Description
A vulnerability was discovered in gdm when timed login is enabled in configuration. An attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to expire at which time they would gain access to the logged-in user's session.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Ensure timed login is not enabled in gdm configuration, by checking the output of:
grep TimedLogin /etc/gdm/custom.conf
CVSS / CWE
CVSS 3.0 · 6.3CVSS:3.0/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-287 · Improper Authentication