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CVE-2016-6259

Published: 2 August 2016

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.

Notes

AuthorNote
mdeslaur
4.5+ only

Priority

Medium

Cvss 3 Severity Score

6.2

Score breakdown

Status

Package Release Status
xen
Launchpad, Ubuntu, Debian
precise Not vulnerable
(4.1.6.1-0ubuntu0.12.04.11)
trusty Does not exist
(trusty was not-affected [4.4.2-0ubuntu0.14.04.6])
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 6.2
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H