CVE-2016-6259

6.2 MEDIUM
Published: August 02, 2016 Modified: May 06, 2026
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://support.citrix.com/article/CTX214954
Source: cve@mitre.org
Vendor Advisory
http://www.securityfocus.com/bid/92130
Source: cve@mitre.org
Third Party Advisory
http://www.securitytracker.com/id/1036447
Source: cve@mitre.org
Third Party Advisory
http://xenbits.xen.org/xsa/advisory-183.html
Source: cve@mitre.org
Mailing List Patch
http://xenbits.xen.org/xsa/xsa183-4.6.patch
Source: cve@mitre.org
Mitigation Patch
http://xenbits.xen.org/xsa/xsa183-unstable.patch
Source: cve@mitre.org
Mitigation Patch
http://support.citrix.com/article/CTX214954
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://www.securityfocus.com/bid/92130
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://www.securitytracker.com/id/1036447
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://xenbits.xen.org/xsa/advisory-183.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Patch
http://xenbits.xen.org/xsa/xsa183-4.6.patch
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Patch
http://xenbits.xen.org/xsa/xsa183-unstable.patch
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Patch

12 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.2 / 10.0
EPSS (Exploit Probability)
0.3%
50th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

xen citrix