MEDIUM
An issue was discovered in Xen 4.4.x through 4.9.x allowing ARM guest OS users to cause a denial of service (prevent physical CPU usage) because of lock mishandling upon detection of an add-to-physmap error.
http://www.debian.org/security/2017/dsa-3969
Source: MITRE
Published: 2017-10-18
Updated: 2017-11-04
Type: CWE-400
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