How severe is CVE-2014-8866?

CVE-2014-8866 has a CVSS 2.0 base score of 4.7, rated medium severity.

Is CVE-2014-8866 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-8866?

CVE-2014-8866 primarily affects Debian Debian Linux. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-8866?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-8866 published?

CVE-2014-8866 was published on 2014-12-01 and last updated on 2026-06-17.

CVE-2014-8866

CVE-2014-8866 is a medium-severity vulnerability in Debian Debian Linux with a CVSS 2.0 base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-17.

Key facts

Severity: Medium (CVSS 2.0 base score 4.7)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-17
Affected product: Debian Debian Linux
Published: 2014-12-01
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2014-8866?: 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.
How severe is CVE-2014-8866?: CVE-2014-8866 has a CVSS 2.0 base score of 4.7, rated medium severity.
Is CVE-2014-8866 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-8866?: CVE-2014-8866 primarily affects Debian Debian Linux. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-8866?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-8866 published?: CVE-2014-8866 was published on 2014-12-01 and last updated on 2026-06-17.

References

Affected products (31)

cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.1.6.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.4.0:rc1:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

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