CVE-2016-6258
Publication date 2 August 2016
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| xen | 16.04 LTS xenial |
Fixed 4.6.0-1ubuntu4.2
|
| 14.04 LTS trusty |
Fixed 4.4.2-0ubuntu0.14.04.7
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.8 · High
|
| 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 |