The _rl_tropen function in util.c in GNU readline before 6.3 patch 3 allows local users to create or overwrite arbitrary files via a symlink attack on a /var/tmp/rltrace.[PID] file.
https://lists.fedoraproject.org/pipermail/package-announce/2014-July/135686.html
https://bugzilla.redhat.com/show_bug.cgi?id=1077023
http://seclists.org/oss-sec/2014/q1/587
http://seclists.org/oss-sec/2014/q1/579
http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00037.html
http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00057.html