Vulnerability Description
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | 4.5.0 |
| Citrix | Xenserver | 6.0 |
Related Weaknesses (CWE)
References
- http://support.citrix.com/article/CTX214954Vendor Advisory
- http://www.securityfocus.com/bid/92130Third Party Advisory
- http://www.securitytracker.com/id/1036447Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-183.htmlMailing ListPatch
- http://xenbits.xen.org/xsa/xsa183-4.6.patchMitigationPatch
- http://xenbits.xen.org/xsa/xsa183-unstable.patchMitigationPatch
- http://support.citrix.com/article/CTX214954Vendor Advisory
- http://www.securityfocus.com/bid/92130Third Party Advisory
- http://www.securitytracker.com/id/1036447Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-183.htmlMailing ListPatch
- http://xenbits.xen.org/xsa/xsa183-4.6.patchMitigationPatch
- http://xenbits.xen.org/xsa/xsa183-unstable.patchMitigationPatch
FAQ
What is CVE-2016-6259?
CVE-2016-6259 is a vulnerability with a CVSS score of 6.2 (MEDIUM). Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial o...
How severe is CVE-2016-6259?
CVE-2016-6259 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-6259?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Citrix Xenserver.