CVE-2017-8903

Publication date 11 May 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	17.04 zesty	Fixed 4.8.0-1ubuntu2.1
	16.10 yakkety	Fixed 4.7.2-0ubuntu1.2
	16.04 LTS xenial	Fixed 4.6.5-0ubuntu1.1
	14.04 LTS trusty	Fixed 4.4.2-0ubuntu0.14.04.11

Notes

mdeslaur

This is XSA-213

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.8 · High

Base metrics

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

Scores

Parameter	Value
Base score	8.8 · High
Exploitability score	-
Impact score	-

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