Array index error in the asihpi_hpi_ioctl function in sound/pci/asihpi/hpioctl.c in the AudioScience HPI driver in the Linux kernel before 2.6.38.1 might allow local users to cause a denial of service (memory corruption) or possibly gain privileges via a crafted adapter index value that triggers access to an invalid kernel pointer.
https://bugzilla.redhat.com/show_bug.cgi?id=688898
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38.1
http://openwall.com/lists/oss-security/2011/03/18/2