CVE-2016-4963

Publication date 7 June 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The libxl device-handling in Xen through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	16.04 LTS xenial	Fixed 4.6.0-1ubuntu4.1
	15.10 wily	Fixed 4.5.1-0ubuntu1.4
	14.04 LTS trusty	Fixed 4.4.2-0ubuntu0.14.04.6
	12.04 LTS precise	Ignored

Notes

mdeslaur

we will not be fixing this issue in precise

Severity score breakdown

CVSS version: CVSS v3.0

Base score 4.7 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	4.7 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H