CVE-2015-7812 Denial of service in n/a

Medium 4.9 Published 17 Nov 2015 Updated 6 Aug 2024

Local guest users can crash the Xen hypervisor host by issuing a preemptible hypercall to the multicall interface.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2015-7812?

CVE-2015-7812 is a medium-severity denial of service vulnerability in Xen Xen, published on 17 Nov 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The hypercall_create_continuation function in arch/arm/domain.c in Xen 4.4.x through 4.6.x allows local guest users to cause a denial of service (host crash) via a preemptible hypercall to the multicall interface.

Weakness: CWE-254

Which versions are affected by CVE-2015-7812?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2015-7812?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-7812 being exploited?

There is no known exploitation of CVE-2015-7812 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-7812, GHSA-85xv-69p8-3c8j, UBUNTU-CVE-2015-7812.