Red Hat Security Advisory 2017-2128-01 - The GNOME Display Manager 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, gnome-session. Security Fix: 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.
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