Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.
Created Thunar tracking bugs for this issue:
Affects: epel-all [bug 1645975]
Affects: fedora-all [bug 1645974]
FYI, only f27,f28 and epel7 are affected. f29/rawhide are using a newer Thunar/Xfce.
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.