Buffer overflow in the __nfs4_get_acl_uncached function in fs/nfs/nfs4proc.c in the Linux kernel before 3.7.2 allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact via a getxattr system call for the system.nfs4_acl extended attribute of a pathname on an NFSv4 filesystem.
http://rhn.redhat.com/errata/RHSA-2013-1645.html
http://rhn.redhat.com/errata/RHSA-2014-0284.html
https://bugzilla.redhat.com/show_bug.cgi?id=1031678
https://github.com/torvalds/linux/commit/7d3e91a89b7adbc2831334def9e494dd9892f9af