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Fencer Vulns
high 7.0

CVE-2018-10853 json

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor.

published 2018-09-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2922

cvss
7.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.

Patch / fix

  • linux linux_kernel 4.18
  • linux Debian 14, Debian 13, Debian 12 4.16.16-1

debian advisories DEBIAN-CVE-2018-10853

  • linux Ubuntu 16.04 LTS 4.4.0-133.159
  • linux Ubuntu 18.04 LTS 4.15.0-36.39
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1027.30
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1065.75
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1023.23
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1021.22~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1021.22
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-36.39~16.04.1

ubuntu advisories UBUNTU-CVE-2018-10853

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

  • kernel RHEL 7 3.10.0-1062.el7
  • perf RHEL 7 3.10.0-1062.el7
  • bpftool RHEL 7 3.10.0-1062.el7
  • python-perf RHEL 7 3.10.0-1062.el7
  • kernel-kdump RHEL 7 3.10.0-1062.el7
  • kernel-tools RHEL 7 3.10.0-1062.el7
  • kernel-tools-libs RHEL 7 3.10.0-1062.el7
  • kernel-bootwrapper RHEL 7 3.10.0-1062.el7

red hat advisories RHSA-2019:2029RHSA-2020:0103RHSA-2019:2043RHSA-2020:0179RHSA-2020:0036

  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 4.4.178-94.91.1
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 4.4.178-94.91.1
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +2 more 4.4.178-94.91.2
  • kernel-obs-build SLE Software Development Kit 12 SP3 4.4.178-94.91.1
  • kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.95.1
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.95.1
  • lttng-modules SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 2.7.1-9.6.1
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +3 more 4.4.121-92.95.1

suse advisories SUSE-SU-2019:1245-1SUSE-SU-2018:2908-2SUSE-SU-2018:3084-1SUSE-SU-2018:3083-1SUSE-SU-2018:2935-1SUSE-SU-2018:2933-1

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-2018-10853 updated cvss 7.0

kernel: kvm: guest userspace to guest kernel write

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) perf 3.10.0-862.46.1.el7, kernel 3.10.0-862.46.1.el7, python-perf 3.10.0-862.46.1.el7, kernel-tools 3.10.0-862.46.1.el7, kernel-tools-libs 3.10.0-862.46.1.el7, kernel-abi-whitelists 3.10.0-862.46.1.el7, +1 more
    fixed: vendor fix RHSA-2020:0036
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.43.1.el7, kernel 3.10.0-957.43.1.el7, bpftool 3.10.0-957.43.1.el7, python-perf 3.10.0-957.43.1.el7, kernel-tools 3.10.0-957.43.1.el7, kernel-tools-libs 3.10.0-957.43.1.el7, +2 more
    fixed: vendor fix RHSA-2020:0179
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-debuginfo-common-x86_64 3.10.0-862.46.1.el7
    fixed: vendor fix RHSA-2020:0036
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.43.1.el7
    fixed: vendor fix RHSA-2020:0179
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1062.rt56.1022.el7, kernel-rt-trace 3.10.0-1062.rt56.1022.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.rt56.1022.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1062.rt56.1022.el7, kernel-rt-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-trace 3.10.0-1062.rt56.1022.el7, kernel-rt-debug-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-trace-kvm 3.10.0-1062.rt56.1022.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.rt56.1022.el7
    fixed: vendor fix RHSA-2019:2043
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-kdump 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, +7 more
    fixed: vendor fix RHSA-2019:2029
show 11 more
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.62.1.el7, kernel 3.10.0-693.62.1.el7, python-perf 3.10.0-693.62.1.el7, kernel-tools 3.10.0-693.62.1.el7, kernel-tools-libs 3.10.0-693.62.1.el7, kernel-abi-whitelists 3.10.0-693.62.1.el7, +1 more Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.62.1.el7, kernel 3.10.0-693.62.1.el7, python-perf 3.10.0-693.62.1.el7, kernel-tools 3.10.0-693.62.1.el7, kernel-tools-libs 3.10.0-693.62.1.el7, kernel-bootwrapper 3.10.0-693.62.1.el7, +3 more
    fixed: vendor fix RHSA-2020:0103
  • Red Hat Enterprise Linux Server EUS (v. 7.5) perf 3.10.0-862.46.1.el7, kernel 3.10.0-862.46.1.el7, python-perf 3.10.0-862.46.1.el7, kernel-kdump 3.10.0-862.46.1.el7, kernel-tools 3.10.0-862.46.1.el7, kernel-tools-libs 3.10.0-862.46.1.el7, +6 more
    fixed: vendor fix RHSA-2020:0036
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.43.1.el7, kernel 3.10.0-957.43.1.el7, bpftool 3.10.0-957.43.1.el7, python-perf 3.10.0-957.43.1.el7, kernel-kdump 3.10.0-957.43.1.el7, kernel-tools 3.10.0-957.43.1.el7, +7 more
    fixed: vendor fix RHSA-2020:0179
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1062.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.el7
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.62.1.el7 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.62.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.62.1.el7
    fixed: vendor fix RHSA-2020:0103
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debuginfo-common-ppc64 3.10.0-862.46.1.el7, kernel-debuginfo-common-x86_64 3.10.0-862.46.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.46.1.el7
    fixed: vendor fix RHSA-2020:0036
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.43.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.43.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.43.1.el7
    fixed: vendor fix RHSA-2020:0179
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.62.1.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.62.1.el7, kernel 3.10.0-693.62.1.el7, python-perf 3.10.0-693.62.1.el7, kernel-tools 3.10.0-693.62.1.el7, kernel-tools-libs 3.10.0-693.62.1.el7, kernel-abi-whitelists 3.10.0-693.62.1.el7, +1 more
    fixed: vendor fix RHSA-2020:0103
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1062.el7, kernel 3.10.0-1062.el7, bpftool 3.10.0-1062.el7, python-perf 3.10.0-1062.el7, kernel-tools 3.10.0-1062.el7, kernel-tools-libs 3.10.0-1062.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.el7
    fixed: vendor fix RHSA-2019:2029
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.43.1.el7, python-perf 3.10.0-957.43.1.el7
    fixed: vendor fix RHSA-2020:0179
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.0 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Linux kernel

Classification

Weakness
  • CWE-250 Execution with Unnecessary Privileges
  • CWE-269 Improper Privilege Management
Technology feeds

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.