CVE-2013-4512 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4512): Buffer overflow in the exitcode_proc_write function in arch/um/kernel/exitcode.c in the Linux kernel before 3.12 allows local users to cause a denial of service or possibly have unspecified other impact by leveraging root privileges for a write operation.
Fix in 3.12: https://github.com/torvalds/linux/commit/201f99f170df14ba52ea4c52847779042b7a623b