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.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8275cdd0e7ac550dcce2b3ef6d2fb3b808c1ae59
rhn.redhat.com/errata/RHSA-2015-0290.html
rhn.redhat.com/errata/RHSA-2015-0694.html
www.securitytracker.com/id/1031853
www.ubuntu.com/usn/USN-2543-1
www.ubuntu.com/usn/USN-2544-1
bugzilla.redhat.com/show_bug.cgi?id=1195248
github.com/torvalds/linux/commit/8275cdd0e7ac550dcce2b3ef6d2fb3b808c1ae59