CVE-2016-3961

Description

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.12%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://xenbits.xen.org/xsa/xsa174.patch patch
http://www.ubuntu.com/usn/USN-3006-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-3004-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-3001-1 third party advisory vendor advisory
http://xenbits.xen.org/xsa/advisory-174.html vendor advisory
http://www.ubuntu.com/usn/USN-3005-1 third party advisory vendor advisory
http://www.securitytracker.com/id/1035569 vdb entry third party advisory
http://www.ubuntu.com/usn/USN-3049-1 vendor advisory
http://www.debian.org/security/2016/dsa-3607 vendor advisory
http://www.ubuntu.com/usn/USN-3002-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-3050-1 vendor advisory
http://www.ubuntu.com/usn/USN-3007-1 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-3003-1 third party advisory vendor advisory
http://www.securityfocus.com/bid/86068 vdb entry

Frequently Asked Questions

What is the severity of CVE-2016-3961?
CVE-2016-3961 has been scored as a medium severity vulnerability.
How to fix CVE-2016-3961?
To fix CVE-2016-3961, 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-2016-3961 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-3961 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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