Gnome GDM 3.14.2 and possibly later are vulnerable to an information disclosure vulnerability, specifically when a laptop screen is closed to trigger the screen lock, and the lid is then re-opened the previous contents of the screen are visible for approx. 1 second, which is long enough to take a picture or video record it before the lock screen kicks in.
Upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=753678
(In reply to Tim Jackson from comment #1)
> Why WONTFIX?
Requirement for physical access of the attacker and limited information disclosure as the only impact makes this a Low impact bug, hence WONTFIX.
Red Hat Product Security has rated this issue as having Low security
impact. This issue is not currently planned to be addressed in future
updates. For additional information, refer to the Issue Severity