CVE-2016-5242

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.

CVSS Metrics

• v3.0•MEDIUM•Score: 5.6CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.7AV:L/AC:M/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.14%• Percentile: 33%

Affected Systems

• xen•xen

  4.4.0 | 4.4.0:rc1 | 4.4.1 | 4.4.2 | 4.4.3 | 4.4.4 | 4.5.0 | 4.5.1 | 4.5.2 | 4.5.3 | 4.6.0 | 4.6.1

References (4)

• http://www.securityfocus.com/bid/91015
• http://xenbits.xen.org/xsa/advisory-181.html
• http://www.securitytracker.com/id/1036035
• http://www.debian.org/security/2016/dsa-3633