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Fencer Vulns
medium 6.5

CVE-2017-10923 json

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service…

published 2017-07-05 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-2561

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service (hypervisor crash), aka XSA-225.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.8.1-1+deb9u3

debian advisories DEBIAN-CVE-2017-10923

  • xen Ubuntu 16.04 LTS 4.6.5-0ubuntu1.2

ubuntu advisories UBUNTU-CVE-2017-10923

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 Alpine 3.24, Alpine 3.23, Alpine 3.22 +15 more 4.9.0-r0
  • xen Alpine 3.4, Alpine 3.3 4.6.6-r0
  • xen Alpine 3.5 4.7.3-r0
  • xen Alpine 3.6 4.8.2-r0

alpine advisories ALPINE-CVE-2017-10923

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-2017-10923 updated cvss 7.7

xen: arm: vgic: Out-of-bound access when sending SGIs (XSA-225)

  • Red Hat Enterprise Linux 5 xen
    not affected: vulnerable code not present

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

1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns 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.