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Fencer Intel
high 8.8

CVE-2018-19966 json

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain…

published 7y ago modified 4mo ago also EUVD-2018-11636

cvss
8.8
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 38%
public exploits
0
none known

Summary

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorrect fix for CVE-2017-15595.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.11.1-1

debian advisories DEBIAN-CVE-2018-19966

  • xen SLE Point of Sale 11 SP3 4.2.5_21-45.30.1
  • xen SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.7.6_05-43.45.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_38-61.40.1
  • xen SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +1 more 4.11.1_02-2.3.1
  • xen SLE Module for Server Applications 15, SLE Module for Basesystem 15 4.10.2_04-3.9.1
  • xen SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +1 more 4.9.3_03-3.47.1
  • xen SLES 12-LTSS 4.4.4_40-22.77.1
  • xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS 4.5.5_28-22.58.1

suse advisories SUSE-SU-2019:14011-1SUSE-SU-2019:0827-1SUSE-SU-2019:0825-1SUSE-SU-2019:0020-1SUSE-SU-2019:13921-1SUSE-SU-2019:0003-1

  • xen openSUSE Tumbleweed 4.15.1_01-1.2

opensuse advisories openSUSE-SU-2024:11520-1

  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 4.11.1-r0
  • xen Alpine 3.6 4.8.5-r0
  • xen Alpine 3.7 4.9.3-r1
  • xen Alpine 3.8 4.10.2-r1

alpine advisories ALPINE-CVE-2018-19966

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

Is CVE-2018-19966 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2018-19966 updated cvss 5.1

xen: Conflicts with shadow paging due to XSA-240 incomplete fix (XSA-280)

  • 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

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/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.