CVE-2016-4480

CVE Details

Release Date:	2016-05-17
Impact:	Moderate	What is this?

Description

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

See more information about CVE-2016-4480 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	4.3
Vector String:	AV:A/AC:H/Au:N/C:P/I:P/A:P
Version:	2.0
Attack Vector:	Adjacent Network
Attack Complexity:	High
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial

Errata information

Platform	Errata	Release Date
Oracle VM version 3.2 (xen)	OVMSA-2016-0090	2016-07-27
Oracle VM version 3.3 (xen)	OVMSA-2016-0089	2016-07-27
Oracle VM version 3.4 (xen)	OVMSA-2016-0088	2016-07-27