CVE-2018-18021

lowpriority · track · 28EPSS 0.006 · 48 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.59% (48th) EPSS
CVSS 3.6 · low
Is it mine?
43 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

arch/arm64/kvm/guest.c in KVM in the Linux kernel before 4.18.12 on the arm64 platform mishandles the KVM_SET_ON_REG ioctl. This is exploitable by attackers who can create virtual machines. An attacker can arbitrarily redirect the hypervisor flow of control (with full register control). An attacker can also cause a denial of service (hypervisor panic) via an illegal exception return. This occurs because of insufficient restrictions on userspace access to the core register file, and because PSTATE.M validation does not prevent unintended execution modes.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedkernel-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-abi-whitelists-0:4.14.0-115.2.2.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-alt-0:4.14.0-115.2.2.el7a.src as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-bootwrapper-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debug-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debug-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debug-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debug-devel-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debuginfo-common-ppc64le-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-debuginfo-common-ppc64le-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-devel-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-doc-0:4.14.0-115.2.2.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-headers-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-tools-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-tools-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-tools-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-tools-libs-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedkernel-tools-libs-devel-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedperf-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedperf-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedperf-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedpython-perf-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedpython-perf-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
  • Fixedpython-perf-debuginfo-0:4.14.0-115.2.2.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2018:3656
02

cvss

Technical severity, 0–10. One row per scoring source.

7.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.6–7.1

v2.03.6lowAV:L/AC:L/Au:N/C:N/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 4.9
v3.07.1highCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.2
v3.06.5mediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.06.7mediumCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US
v3.17.1highAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Hsecondary · FSTEC (BDU) RU
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-20US
04

affected products (43)

Products and version ranges known to be affected.

showing 20 of 43
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • RHSA-2018:3656Red Hat Security Advisory: kernel-alt security and bug fix update2018-11-26csaf · redhat_csafUS

    An update for kernel-alt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bdunvdredhat_csafNVDCVE.orgMITRE
published 2018-10-07modified 2026-06-17
09

references (41)

External citations — patches, advisories, analysis.

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