CVE-2016-9382
Published: 23 January 2017
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
Notes
| Author | Note |
|---|---|
| mdeslaur | This is XSA-192 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
xen Launchpad, Ubuntu, Debian |
precise |
Released
(4.1.6.1-0ubuntu0.12.04.13)
|
| trusty |
Released
(4.4.2-0ubuntu0.14.04.9)
|
|
| upstream |
Needed
|
|
| xenial |
Released
(4.6.0-1ubuntu4.3)
|
|
| yakkety |
Released
(4.7.0-0ubuntu2.1)
|
|
| zesty |
Released
(4.8.0-1ubuntu1)
|
|
| Binaries built from this source package are in Universe and so are supported by the community. | ||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |