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CVE-2016-6258

Published: 2 August 2016

The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
xen
Launchpad, Ubuntu, Debian
precise
Released (4.1.6.1-0ubuntu0.12.04.12)
trusty
Released (4.4.2-0ubuntu0.14.04.7)
upstream Needs triage

wily Ignored
(end of life)
xenial
Released (4.6.0-1ubuntu4.2)
Binaries built from this source package are in Universe and so are supported by the community.

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H