CVE-2016-5242
Publication date 7 June 2016
Last updated 25 August 2025
Ubuntu priority
Description
The p2m_teardown function in arch/arm/p2m.c in Xen 4.4.x through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service (NULL pointer dereference and host OS crash) by creating concurrent domains and holding references to them, related to VMID exhaustion.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| xen | 16.04 LTS xenial |
Fixed 4.6.0-1ubuntu4.1
|
| 14.04 LTS trusty |
Fixed 4.4.2-0ubuntu0.14.04.6
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.6 · Medium
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |