Vulnerability Report

CVE-2016-3158

Title: Xen Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2016-3158.

CWE Category CWE-200
Published Date Apr 13, 2016
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 3.8 CVSS v3.0
Exploit Probability (EPSS)
0.41%

Vulnerability Summary

CVE-2016-3158: 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.

Impacted Vendors

R
redhat 1
X
xensource_inc 1
X
xen 1
F
fedoraproject 1
O
oracle 1

Reference Links

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html http://support.citrix.com/article/CTX209443 http://www.debian.org/security/2016/dsa-3554 http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html http://www.securityfocus.com/bid/85714 http://www.securitytracker.com/id/1035435 http://xenbits.xen.org/xsa/advisory-172.html http://xenbits.xen.org/xsa/xsa172-4.3.patch http://xenbits.xen.org/xsa/xsa172.patch http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html http://support.citrix.com/article/CTX209443 http://www.debian.org/security/2016/dsa-3554 http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html http://www.securityfocus.com/bid/85714 http://www.securitytracker.com/id/1035435 http://xenbits.xen.org/xsa/advisory-172.html http://xenbits.xen.org/xsa/xsa172-4.3.patch http://xenbits.xen.org/xsa/xsa172.patch
CVSS v3.0
Source Entity [email protected]
Severity LOW
3.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity LOW
1.7
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:S/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-3158 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected Stack

No specific products linked.