CVE-2018-19961 Privilege escalation in n/a
Guest OS users can gain host OS privileges on AMD x86 platforms due to missing TLB flushes after IOMMU mapping changes.
- 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-2018-19961?
CVE-2018-19961 is a high-severity vulnerability in Citrix Xenserver, published on 8 Dec 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.
Weakness: CWE-459
Which versions are affected by CVE-2018-19961?
It affects 3 products.
Products include Citrix Xenserver, Debian Debian Linux, Xen Xen.
How do I fix CVE-2018-19961?
Apply the vendor's patch.
Is CVE-2018-19961 being exploited?
There is no known exploitation of CVE-2018-19961 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2018-19961, DEBIAN-CVE-2018-19961, GHSA-qwxp-946x-p86v, UBUNTU-CVE-2018-19961.