CVE-2016-6259

mediumpriority · track · 25EPSS 0.006 · 50 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.64% (50th) EPSS

CVSS 4.9 · medium

Is it mine?

15 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.9mediumAV:L/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 6.9

v3.06.2mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.5 · impact 3.6

v3.05.7mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

affected products (15)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
citrix xenserver= 6.0nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver= 6.0.2nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver= 6.1nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver= 6.2.0nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver= 6.5.0nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver= 7.0nvdUScpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
xen xen= 4.5.0nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.5.1nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.5.2nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.5.3nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.6.0nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.6.1nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.6.3nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
xen xen= 4.7.0nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2016-08-02modified 2026-06-17

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+25194 more

references (18)

External citations — patches, advisories, analysis.

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