CVE Catalog

CVE-2016-4480

High
Published: Translated: NVD NIST

Summary

The guest_walk_tables function in Xen 4.6.x and earlier improperly handles 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.

Risk Assessment

This vulnerability may lead to privilege escalation in the guest system, posing a serious security threat to the virtual environment.

Recommendation

It is recommended to upgrade to the latest version of Xen to mitigate this vulnerability and to monitor access to guest systems.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS