CVE-2016-7154

Publication date 21 September 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Use-after-free vulnerability in the FIFO event channel code in Xen 4.4.x allows local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Fixed 4.4.2-0ubuntu0.14.04.7
	12.04 LTS precise	Not affected

Notes

tyhicks

only Xen 4.4.x is affected

Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.7 · Medium

Base metrics

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

Scores

Parameter	Value
Base score	6.7 · Medium
Exploitability score	-
Impact score	-

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