How severe is CVE-2013-4551?

CVE-2013-4551 has a CVSS 2.0 base score of 5.7, rated medium severity.

Is CVE-2013-4551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4551?

CVE-2013-4551 primarily affects Xen. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4551?

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

When was CVE-2013-4551 published?

CVE-2013-4551 was published on 2013-11-18 and last updated on 2026-06-16.

CVE-2013-4551

CVE-2013-4551 is a medium-severity vulnerability in Xen with a CVSS 2.0 base score of 5.7. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.7)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Xen
Published: 2013-11-18
Last modified: 2026-06-16

Description

Xen 4.2.x and 4.3.x, when nested virtualization is disabled, does not properly check the emulation paths for (1) VMLAUNCH and (2) VMRESUME, which allows local HVM guest users to cause a denial of service (host crash) via unspecified vectors related to "guest VMX instruction execution."

Frequently asked questions

What is CVE-2013-4551?: Xen 4.2.x and 4.3.x, when nested virtualization is disabled, does not properly check the emulation paths for (1) VMLAUNCH and (2) VMRESUME, which allows local HVM guest users to cause a denial of service (host crash) via unspecified vectors related to "guest VMX instruction execution."
How severe is CVE-2013-4551?: CVE-2013-4551 has a CVSS 2.0 base score of 5.7, rated medium severity.
Is CVE-2013-4551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4551?: CVE-2013-4551 primarily affects Xen. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4551 published?: CVE-2013-4551 was published on 2013-11-18 and last updated on 2026-06-16.

References

Affected products (6)

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:*:*:*:*:*:*:*

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