Is CVE-2017-17564 in the CISA KEV catalog?

No. CVE-2017-17564 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-17564?

CVE-2017-17564 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2017-17564?

CVE-2017-17564 has an EPSS score of 0.35% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-17564?

Upgrade xen on debian 11 to 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 or later.

CVE & CISA-KEV Catalog

CVE-2017-17564

HIGH

7.8

CVSS v3

NVD

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.

CWE-388

How to fix

Remediation Available

xenDebian

Fixed in:4.8.3+comet2+shim4.10.0+comet3-1+deb9u5CVE-2017-17564

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

0.35%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Patch1

xenbits.xen.org

Mailing List1

openwall.com

Other references7

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.