RHSA-2017:2128 — Security Advisory
Red Hat Security Advisory: gdm and gnome-session security, bug fix, and enhancement update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · August 2, 2017
Updated · June 27, 2026
Topic
An update for gdm and gnome-session is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The GNOME Display Manager (GDM) provides the graphical login screen shown shortly after boot up, log out, and when user-switching.
The following packages have been upgraded to a later upstream version: gdm (3.22.3), gnome-session (3.22.3). (BZ#1386862, BZ#1386957)
Security Fix(es):
- It was found that gdm could crash due to a signal handler dispatched to an invalid conversation. An attacker could crash gdm by holding the escape key when the screen is locked, possibly bypassing the locked screen. (CVE-2015-7496)
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.