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
Author | Note |
---|---|
mdeslaur | 4.5+ only |
Priority
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 |