A domain cleanup issue was discovered in the C xenstore daemon (aka cxenstored) in Xen through 4.9.x. When shutting down a VM with a stubdomain, a race in cxenstored may cause a double-free. The xenstored daemon may crash, resulting in a DoS of any parts of the system relying on it (including domain creation / destruction, ballooning, device changes, etc.).
http://www.securityfocus.com/bid/100826
http://www.securitytracker.com/id/1039350
http://xenbits.xen.org/xsa/advisory-233.html
https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
Source: MITRE
Published: 2017-09-12
Updated: 2018-10-19
Type: CWE-362
Base Score: 4.7
Vector: AV:L/AC:M/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 5.6
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 1.1
Severity: MEDIUM