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Fencer Intel
high 7.8

CVE-2017-17564 json

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 privilege…

published 2017-12-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-8722

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

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.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5

debian advisories DEBIAN-CVE-2017-17564

  • xen Ubuntu 18.04 LTS 4.9.2-0ubuntu1

ubuntu advisories UBUNTU-CVE-2017-17564

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 4.2.5_21-45.19.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_28-61.23.2
  • xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 4.5.5_24-22.43.1
  • xen SLES for SAP 12 SP2, SLES 12 SP2, SLED 12 SP2 +1 more 4.7.4_06-43.24.1
  • xen SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +1 more 4.9.1_08-3.26.1
  • xen SLES 12-LTSS 4.4.4_28-22.62.1

suse advisories SUSE-SU-2018:0678-1SUSE-SU-2018:0638-1SUSE-SU-2018:0609-1SUSE-SU-2018:0601-1SUSE-SU-2018:0472-1SUSE-SU-2018:0438-1

  • xen Alpine 3.4 4.6.6-r3
  • xen Alpine 3.5 4.7.3-r5
  • xen Alpine 3.6 4.8.2-r5

alpine advisories ALPINE-CVE-2017-17564

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-17564 updated cvss 7.8

xen: improper x86 shadow mode refcount error handling (XSA-250)

  • Red Hat Enterprise Linux 5 xen
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.