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TI-2016-05362 Aliases CVE-2016-6259GHSA-prj4-495w-f4qv

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP)…

Priority LOW 29CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Will not fix Red Hat: no fix planned

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.00639 50th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*4.5.0VulnerableXen
cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*4.5.1VulnerableXen
cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*4.5.2VulnerableXen
cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:*4.5.3VulnerableXen
cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*4.6.0VulnerableXen
cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*4.6.1VulnerableXen
cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*4.6.3VulnerableXen
cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*4.7.0VulnerableXen
cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*6.0VulnerableCitrix
cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*6.0.2VulnerableCitrix
  • cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:* Versions 4.5.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:* Versions 4.5.1 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:* Versions 4.5.2 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:* Versions 4.5.3 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:* Versions 4.6.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:* Versions 4.6.1 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:* Versions 4.6.3 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:* Versions 4.7.0 Vulnerable ·Xen
  • cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:* Versions 6.0.2 Vulnerable ·Citrix
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:citrix:xenserver:6.1:*:*:*:*:*:*:*6.1VulnerableCitrix
cpe:2.3:a:citrix:xenserver:6.2.0:sp1:*:*:*:*:*:*6.2.0 sp1VulnerableCitrix
cpe:2.3:a:citrix:xenserver:6.5.0:sp1:*:*:*:*:*:*6.5.0 sp1VulnerableCitrix
cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*7.0VulnerableCitrix
  • cpe:2.3:a:citrix:xenserver:6.1:*:*:*:*:*:*:* Versions 6.1 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:xenserver:6.2.0:sp1:*:*:*:*:*:* Versions 6.2.0 sp1 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:xenserver:6.5.0:sp1:*:*:*:*:*:* Versions 6.5.0 sp1 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Citrix

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-6259
  2. 2026-10-03 Alias added: GHSA-prj4-495w-f4qv
  3. 2026-10-24 EPSS moved to the 50th–90th percentile

References

Patch 3

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences