CVE-2016-6259

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Summary

CVECVE-2016-6259
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-08-02 16:59:09 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionXen 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.

Risk And Classification

Primary CVSS: v3.0 6.2 MEDIUM from [email protected]

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary6.2MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Citrix Xenserver 6.0 All All All
Application Citrix Xenserver 6.0.2 All All All
Application Citrix Xenserver 6.1 All All All
Application Citrix Xenserver 6.2.0 sp1 All All
Application Citrix Xenserver 6.5.0 sp1 All All
Application Citrix Xenserver 7.0 All All All
Operating System Xen Xen 4.5.0 All All All
Operating System Xen Xen 4.5.1 All All All
Operating System Xen Xen 4.5.2 All All All
Operating System Xen Xen 4.5.3 All All All
Operating System Xen Xen 4.6.0 All All All
Operating System Xen Xen 4.6.1 All All All
Operating System Xen Xen 4.6.3 All All All
Operating System Xen Xen 4.7.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Citrix XenServer Multiple Security Updates af854a3a-2127-422b-91ae-364da2661108 support.citrix.com Vendor Advisory
xenbits.xen.org/xsa/xsa183-4.6.patch af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Mitigation, Patch
Xen CVE-2016-6259 Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory
XSA-183 - Xen Security Advisories af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Mailing List, Patch
Xen SMAP Safety Check Whitelist Error Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory
xenbits.xen.org/xsa/xsa183-unstable.patch af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Mitigation, Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 500807 Alpine Linux Security Update for xen
  • 504550 Alpine Linux Security Update for xen

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