The cifs_lookup function in fs/cifs/dir.c in the Linux kernel before 3.2.10 allows local users to cause a denial of service (OOPS) via attempted access to a special file, as demonstrated by a FIFO.
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
http://rhn.redhat.com/errata/RHSA-2012-0481.html
http://rhn.redhat.com/errata/RHSA-2012-0531.html
https://bugzilla.redhat.com/show_bug.cgi?id=798293
https://github.com/torvalds/linux/commit/88d7d4e4a439f32acc56a6d860e415ee71d3df08
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10