drivers/hid/hid-corsair.c in the Linux kernel 4.9.x before 4.9.6 interacts incorrectly with the CONFIG_VMAP_STACK option, which allows local users to cause a denial of service (system crash or memory corruption) or possibly have unspecified other impact by leveraging use of more than one virtual page for a DMA scatterlist.
https://github.com/torvalds/linux/commit/6d104af38b570d37aa32a5803b04c354f8ed513d
https://bugzilla.redhat.com/show_bug.cgi?id=1416096
http://www.securityfocus.com/bid/95709
http://www.openwall.com/lists/oss-security/2017/01/21/3