The XFS implementation in the Linux kernel before 3.15 improperly uses an old size value during remote attribute replacement, which allows local users to cause a denial of service (transaction overrun and data corruption) or possibly gain privileges by leveraging XFS filesystem access.
https://github.com/torvalds/linux/commit/8275cdd0e7ac550dcce2b3ef6d2fb3b808c1ae59
https://bugzilla.redhat.com/show_bug.cgi?id=1195248
http://www.ubuntu.com/usn/USN-2544-1
http://www.ubuntu.com/usn/USN-2543-1
http://www.securitytracker.com/id/1031853