CVE-2015-7835

Description

The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.

Category

7.2
CVSS
Severity: High
CVSS 2.0 •
EPSS 0.14%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory xen.org Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://support.citrix.com/article/CTX202404
http://www.securityfocus.com/bid/77366 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html vendor advisory
http://xenbits.xen.org/xsa/advisory-148.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html vendor advisory
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt vendor advisory
http://www.debian.org/security/2015/dsa-3390 vendor advisory
http://www.securitytracker.com/id/1034032 vdb entry
http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html vendor advisory
https://security.gentoo.org/glsa/201604-03 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-7835?
CVE-2015-7835 has been scored as a high severity vulnerability.
How to fix CVE-2015-7835?
To fix CVE-2015-7835, 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-2015-7835 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-7835 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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