CVE-2016-3158

3.8 LOW
Published: April 13, 2016 Modified: May 06, 2026
View on NVD

Description

The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

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:L/UI:N/S:C/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
Source: cve@mitre.org
Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
Source: cve@mitre.org
Third Party Advisory
http://support.citrix.com/article/CTX209443
Source: cve@mitre.org
http://www.debian.org/security/2016/dsa-3554
Source: cve@mitre.org
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
Source: cve@mitre.org
Vendor Advisory
http://www.securityfocus.com/bid/85714
Source: cve@mitre.org
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1035435
Source: cve@mitre.org
Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-172.html
Source: cve@mitre.org
Vendor Advisory
http://xenbits.xen.org/xsa/xsa172-4.3.patch
Source: cve@mitre.org
Patch
http://xenbits.xen.org/xsa/xsa172.patch
Source: cve@mitre.org
Patch
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://support.citrix.com/article/CTX209443
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.debian.org/security/2016/dsa-3554
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://www.securityfocus.com/bid/85714
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1035435
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-172.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://xenbits.xen.org/xsa/xsa172-4.3.patch
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
http://xenbits.xen.org/xsa/xsa172.patch
Source: af854a3a-2127-422b-91ae-364da2661108
Patch

20 reference(s) from NVD

Quick Stats

CVSS v3 Score
3.8 / 10.0
EPSS (Exploit Probability)
0.4%
33th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-200 CWE-284

Affected Vendors

oracle fedoraproject xen

Related CVEs

CVE-2026-48777 N/A
CVE-2026-47750 7.8
CVE-2026-47747 7.8
CVE-2026-46448 5.4
CVE-2026-22313 9.1