How severe is CVE-2017-17564?

CVE-2017-17564 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-17564 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-17564?

CVE-2017-17564 affects Xen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-17564?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-17564 published?

CVE-2017-17564 was published on 2017-12-12 and last updated on 2026-06-17.

CVE-2017-17564

CVE-2017-17564 is a high-severity vulnerability in Xen with a CVSS 3.x base score of 7.8. 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-388.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.9
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-388
Affected product: Xen
Published: 2017-12-12
Last modified: 2026-06-17

Description

An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode.

Frequently asked questions

What is CVE-2017-17564?: An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode.
How severe is CVE-2017-17564?: CVE-2017-17564 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-17564 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-17564?: CVE-2017-17564 affects Xen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-17564?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-17564 published?: CVE-2017-17564 was published on 2017-12-12 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Xen

CVE-2017-10921 — Critical (CVSS 10.0): The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and…
CVE-2017-10920 — Critical (CVSS 10.0): The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed…
CVE-2017-10918 — Critical (CVSS 10.0): Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to…
CVE-2017-10912 — Critical (CVSS 10.0): Xen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka…
CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2018-12892 — Critical (CVSS 9.9): An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI…

All CVEs affecting Xen →

Other CWE-388 vulnerabilities

CVE-2018-1002105 — Critical (CVSS 9.8): In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied…
CVE-2017-5401 — Critical (CVSS 9.8): A crash triggerable by web content in which an "ErrorResult" references unassigned memory due to a logic error. The…
CVE-2016-10466 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile and Snapdragon Wear MDM9206,…
CVE-2016-10414 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Small Cell SoC, Snapdragon Automobile,…
CVE-2015-9120 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile, Snapdragon Mobile, and…
CVE-2014-9985 — Critical (CVSS 9.8): In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile MDM9635M, SD 400, and SD…

Browse all CWE-388 vulnerabilities →