Xen 4.6.x and earlier allows local guest administrators to cause a denial of service (host reboot) via vectors related to multiple mappings of MMIO pages with different cachability settings.
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177990.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178518.html
http://www.debian.org/security/2016/dsa-3519
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securitytracker.com/id/1035042
Source: MITRE
Published: 2016-02-19
Updated: 2017-07-01
Type: CWE-20
Base Score: 4.6
Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.1
Severity: MEDIUM
Base Score: 6.8
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 2.3
Severity: MEDIUM