CVE-2016-4480: Oracle Vm Server

High severity, CVSS 8.4. EPSS: 0.5% chance of exploitation in the next 30 days.

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

Affected products

• Oracle Vm Server: version 3.2 only; version 3.3 only; version 3.4 only
• Xen Xen: up to and including 4.6.1

Published 2016-05-18. Last modified 2026-06-17.