Is CVE-2014-8866 being actively exploited?

CVE-2014-8866 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2014-8866?

CVE-2014-8866 has a CVSS 2.0 base score of 4.7 (MEDIUM).

CVE-2014-8866

MEDIUM · CVSS 4.7EPSS 0.4%EU EUVD

The compatibility mode hypercall argument translation in Xen 3.3.x through 4.4.x, when running on a 64-bit hypervisor, allows local 32-bit HVM guests to cause a denial of service (host crash) via vectors involving altering the high halves of registers while in 64-bit mode.

Key facts

CVSS score: 4.7 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:M/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-17
EPSS score: 0.4% (38th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2014-8696)
Published: December 1, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-8696 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
opensuse / opensuse
opensuse / opensuse
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen
xen / xen

References

http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html(Third Party Advisory)
http://secunia.com/advisories/59937(Permissions Required, Third Party Advisory)
http://secunia.com/advisories/62672(Permissions Required, Third Party Advisory)
http://support.citrix.com/article/CTX200288
http://support.citrix.com/article/CTX201794(Third Party Advisory)
http://www.debian.org/security/2015/dsa-3140(Third Party Advisory)
http://www.securityfocus.com/bid/71332(Third Party Advisory, VDB Entry)
http://xenbits.xen.org/xsa/advisory-111.html(Patch, Vendor Advisory)
https://security.gentoo.org/glsa/201504-04(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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