The lbs_debugfs_write function in drivers/net/wireless/libertas/debugfs.c in the Linux kernel through 3.12.1 allows local users to cause a denial of service (OOPS) by leveraging root privileges for a zero-length write operation.
Exploitability
AV:LAC:MAu:SImpact
C:NI:NA:C4.4/AV:L/AC:M/Au:S/C:N/I:N/A:C