Vulnerability Report

CVE-2016-3960

Title: Xen Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2016-3960.

CWE Category CWE-264

Published Date Apr 19, 2016

Modified Date Jun 17, 2026

Exploit Status Not Found

Score 8.8 CVSS v3.0

Exploit Probability (EPSS)

0.46%

Vulnerability Summary

CVE-2016-3960: Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping.

Impacted Vendors

Reference Links

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183275.html http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183350.html http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184209.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/86318 http://www.securitytracker.com/id/1035587 http://xenbits.xen.org/xsa/advisory-173.html http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183275.html http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183350.html http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184209.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/86318 http://www.securitytracker.com/id/1035587 http://xenbits.xen.org/xsa/advisory-173.html

CVSS v3.0

Source Entity [email protected]

Severity HIGH

8.8

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:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.2

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-3960 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 17, 2026 MODIFIED

Vulnerability data updated via NVD.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

April 19, 2016 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:H/I:H/A:H

Affected Stack

No specific products linked.