Integer overflow in the NWFS.SYS kernel driver 4.91.5.8 in Novell Client 4.91 SP5 on Windows XP and Windows Server 2003 and the NCPL.SYS kernel driver in Novell Client 2 SP2 on Windows Vista and Windows Server 2008 and Novell Client 2 SP3 on Windows Server 2008 R2, Windows 7, Windows 8, and Windows Server 2012 might allow local users to gain privileges via a crafted 0x1439EB IOCTL call.