cve/2016/CVE-2016-3157.md

CVE-2016-3157

Description

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

POC

Reference

• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
• http://www.ubuntu.com/usn/USN-2970-1

Github

• https://github.com/ARPSyndicate/cvemon