CVE-2019-3825: Canonical Ubuntu Linux

Medium severity, CVSS 6.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability was discovered in gdm before 3.31.4. 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.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 18.10 only
• Gnome Gnome Display Manager: before 3.31.4 (fixed in 3.31.4)
• Red Hat Enterprise Linux: version 7.0 only

Published 2019-02-06. Last modified 2026-06-17.