CVE-2016-9381 Race condition in n/a

High 7.5 Published 23 Jan 2017 Updated 6 Aug 2024

Local guest administrators can escalate privileges via a double fetch race condition in QEMU shared rings.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2016-9381?

CVE-2016-9381 is a high-severity vulnerability in Citrix Xenserver, published on 23 Jan 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.

Weakness: CWE-362

Which versions are affected by CVE-2016-9381?

It affects 2 products.

Products include Citrix Xenserver, Qemu Qemu.

How do I fix CVE-2016-9381?

Apply the vendor's patch.

Is CVE-2016-9381 being exploited?

There is no known exploitation of CVE-2016-9381 in the wild and no public exploit code.

All Citrix Xenserver vulnerabilities

Sources

Also known as ALPINE-CVE-2016-9381, DEBIAN-CVE-2016-9381, GHSA-fg67-6qhp-f8mj, UBUNTU-CVE-2016-9381.