CVE-2016-4480 Privilege escalation in n/a
Local guest OS users can gain privileges by exploiting improper handling of page table entry bits in the Xen hypervisor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4480?
CVE-2016-4480 is a high-severity vulnerability in Xen Xen, published on 18 May 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-264
Which versions are affected by CVE-2016-4480?
It affects 2 products.
Products include Oracle Vm Server, Xen Xen.
How do I fix CVE-2016-4480?
Apply the vendor's patch.
Is CVE-2016-4480 being exploited?
There is no known exploitation of CVE-2016-4480 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2016-4480, GHSA-mrv5-xm7c-h532, UBUNTU-CVE-2016-4480.