Xen through 4.8.x allows local x86 PV guest OS kernel administrators to cause a denial of service (host hang or crash) by modifying the instruction stream asynchronously while performing certain kernel operations.
http://www.debian.org/security/2017/dsa-3847
http://www.securityfocus.com/bid/95021
http://www.securitytracker.com/id/1037517
http://xenbits.xen.org/xsa/advisory-202.html
Source: MITRE
Published: 2017-01-26
Updated: 2017-11-04
Type: CWE-20
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 6
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 1.5
Severity: MEDIUM