How severe is CVE-2013-4356?

CVE-2013-4356 has a CVSS 2.0 base score of 5.4, rated medium severity.

Is CVE-2013-4356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4356?

CVE-2013-4356 affects Xen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-4356?

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

When was CVE-2013-4356 published?

CVE-2013-4356 was published on 2013-10-09 and last updated on 2026-06-16.

CVE-2013-4356

CVE-2013-4356 is a medium-severity vulnerability in Xen with a CVSS 2.0 base score of 5.4. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.4)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Xen
Published: 2013-10-09
Last modified: 2026-06-16

Description

Xen 4.3.x writes hypervisor mappings to certain shadow pagetables when live migration is performed on hosts with more than 5TB of RAM, which allows local 64-bit PV guests to read or write to invalid memory and cause a denial of service (crash).

Frequently asked questions

What is CVE-2013-4356?: Xen 4.3.x writes hypervisor mappings to certain shadow pagetables when live migration is performed on hosts with more than 5TB of RAM, which allows local 64-bit PV guests to read or write to invalid memory and cause a denial of service (crash).
How severe is CVE-2013-4356?: CVE-2013-4356 has a CVSS 2.0 base score of 5.4, rated medium severity.
Is CVE-2013-4356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4356?: CVE-2013-4356 affects Xen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4356?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4356 published?: CVE-2013-4356 was published on 2013-10-09 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*

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