Home/CVE/Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and e
CVE

CVE-2016-6259

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and e

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.

MEDIUM · CVSS 6.2 EPSS 0.00266
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

2
xenall versions
citrix xenserverall versions
▣

Scoring & Timeline

6.2
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Aug 2016 · 04:59 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2024:10196-1
suse-csafSUSE-SU-2016:2473-1
suse-csafSUSE-SU-2016:2093-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://support.citrix.com/article/CTX214954Vendor Advisory
http://www.securityfocus.com/bid/92130Third Party Advisory
http://www.securitytracker.com/id/1036447Third Party Advisory
http://xenbits.xen.org/xsa/advisory-183.htmlMailing ListPatch
http://xenbits.xen.org/xsa/xsa183-4.6.patchMitigationPatch
http://xenbits.xen.org/xsa/xsa183-unstable.patchMitigationPatch
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