CVE-2018-18883: Null Pointer Dereference
An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2018-18883?
CVE-2018-18883 has a high severity level due to its potential to cause a denial of service on the host operating system.
How does CVE-2018-18883 exploit nested VT-x in Xen?
CVE-2018-18883 exploits nested VT-x by not properly restricting access, allowing HVM and PVH guests to dereference a null pointer.
Which versions of Xen are affected by CVE-2018-18883?
CVE-2018-18883 affects Xen versions 4.9.x through 4.11.x on Intel x86 platforms.
What are the potential impacts of CVE-2018-18883?
The potential impacts of CVE-2018-18883 include denial of service on the host OS and possibly other unspecified impacts.
How can I mitigate CVE-2018-18883?
To mitigate CVE-2018-18883, it is recommended to upgrade your Xen installation to a version that is not vulnerable.