CVE-2016-1570: Xen

High severity, CVSS 8.5. EPSS: 1.2% chance of exploitation in the next 30 days.

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.

Affected products

• Xen Xen: version 3.4.0 only; version 3.4.1 only; version 4.1.0 only; version 4.1.1 only; version 4.1.2 only; version 4.1.3 only; …

Published 2016-01-22. Last modified 2026-06-17.