The abrt-action-install-debuginfo-to-abrt-cache help program in Automatic Bug Reporting Tool (ABRT) before 2.7.1 allows local users to write to arbitrary files via a symlink attack on unpacked.cpio in a pre-created directory with a predictable name in /var/tmp.
https://github.com/abrt/abrt/commit/50ee8130fb4cd4ef1af7682a2c85dd99cb99424e
http://www.securityfocus.com/bid/78113
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://rhn.redhat.com/errata/RHSA-2015-2505.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172809.html