CVE-2016-3157 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.debian.org/security/2016/dsa-3607 http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securityfocus.com/bid/84594 http://www.securitytracker.com/id/1035308 http://www.ubuntu.com/usn/USN-2968-1 http://www.ubuntu.com/usn/USN-2968-2 http://www.ubuntu.com/usn/USN-2969-1 http://www.ubuntu.com/usn/USN-2970-1 http://www.ubuntu.com/usn/USN-2971-1 http://www.ubuntu.com/usn/USN-2971-2 http://www.ubuntu.com/usn/USN-2971-3 http://www.ubuntu.com/usn/USN-2996-1 http://www.ubuntu.com/usn/USN-2997-1 http://xenbits.xen.org/xsa/advisory-171.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8