CVE-2016-6259

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.

Category

6.2
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory citrix.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/92130 vdb entry third party advisory
http://support.citrix.com/article/CTX214954 vendor advisory
http://www.securitytracker.com/id/1036447 vdb entry third party advisory
http://xenbits.xen.org/xsa/xsa183-unstable.patch patch mitigation
http://xenbits.xen.org/xsa/advisory-183.html mailing list patch
http://xenbits.xen.org/xsa/xsa183-4.6.patch patch mitigation

Frequently Asked Questions

What is the severity of CVE-2016-6259?
CVE-2016-6259 has been scored as a medium severity vulnerability.
How to fix CVE-2016-6259?
To fix CVE-2016-6259, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-6259 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-6259 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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