CVE-2018-18883: Null Pointer Dereference
First published: Thu Nov 01 2018(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen xen-unstable | >=4.9.0<=4.11.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
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.
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/author
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/event
- agent/description
- agent/type
- agent/first-publish-date
- agent/source
- agent/weakness
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.9.0
- version/xen xen-unstable/4.11.0