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CVE-2014-1438

Description

The restore_fpu_checking function in arch/x86/include/asm/fpu-internal.h in the Linux kernel before 3.12.8 on the AMD K7 and K8 platforms does not clear pending exceptions before proceeding to an EMMS instruction, which allows local users to cause a denial of service (task kill) or possibly gain privileges via a crafted application.

POC

Reference

- http://www.halfdog.net/Security/2013/Vm86SyscallTaskSwitchKernelPanic/

- http://www.ubuntu.com/usn/USN-2136-1

- http://www.ubuntu.com/usn/USN-2139-1

Github

No PoCs found on GitHub currently.