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Fencer Vulns
medium 5.5

CVE-2022-21166 json

Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentiall…

published 2022-06-15 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-26409

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.5%
EPSS 6.5% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

Patch / fix

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1
  • xen Debian 14, Debian 13, Debian 12 4.16.2-1
  • linux Debian 14, Debian 13, Debian 12 5.18.5-1
  • intel-microcode Debian 14, Debian 13, Debian 12 3.20220510.1

debian advisories DEBIAN-CVE-2022-21166

  • linux-gke Ubuntu 20.04 LTS 5.4.0-1076.82
  • linux-gkeop Ubuntu 20.04 LTS 5.4.0-1048.51
  • linux-gke-5.4 Ubuntu 18.04 LTS 5.4.0-1076.82~18.04.1
  • linux-aws-5.13 Ubuntu 20.04 LTS 5.13.0-1031.35~20.04.1
  • linux-dell300x Ubuntu 18.04 LTS 4.15.0-1048.53
  • linux-gcp-5.13 Ubuntu 20.04 LTS 5.13.0-1033.40~20.04.1
  • linux-hwe-5.13 Ubuntu 20.04 LTS 5.13.0-51.58~20.04.1
  • linux-oem-5.14 Ubuntu 20.04 LTS 5.14.0-1044.49

ubuntu advisories UBUNTU-CVE-2022-21166

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

  • microcode_ctl RHEL 9 4:20220809-1.el9
  • kernel RHEL 9 5.14.0-162.6.1.el9_1
  • perf RHEL 9 5.14.0-162.6.1.el9_1
  • bpftool RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-core RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-tools RHEL 9 5.14.0-162.6.1.el9_1
  • python3-perf RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-modules RHEL 9 5.14.0-162.6.1.el9_1

red hat advisories RHBA-2022:8351RHSA-2022:8267RHSA-2022:7933RHSA-2022:8973RHSA-2022:8974RHSA-2022:6872

  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.94.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.94.1
  • kernel-rt_debug SLE Real Time 12 SP5 4.12.14-10.94.1
  • kernel-source-rt SLE Real Time 12 SP5 4.12.14-10.94.1
  • kernel-azure SLE Module for Public Cloud 15 SP4, openSUSE Leap 15.4 5.14.21-150400.14.7.1
  • kernel-syms-azure SLE Module for Public Cloud 15 SP4, openSUSE Leap 15.4 5.14.21-150400.14.7.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP4, openSUSE Leap 15.4 5.14.21-150400.14.7.1
  • xen SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 4.10.4_36-150000.3.77.1

suse advisories SUSE-SU-2023:0416-1SUSE-SU-2022:2629-1SUSE-SU-2022:2615-1SUSE-SU-2022:2601-1SUSE-SU-2022:2600-1SUSE-SU-2022:2599-2

  • kernel-rt openSUSE Leap Micro 5.2 5.3.18-150300.93.1

opensuse advisories openSUSE-SU-2022:2177-1

  • kernel-rt AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-kvm AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-core AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-modules AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-debug-kvm AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-debug-core AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-debug-modules AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1
  • kernel-rt-modules-extra AlmaLinux 9 5.14.0-162.6.1.rt21.168.el9_1

almalinux advisories ALSA-2022:7933ALSA-2022:8267ALSA-2022:6437ALSA-2022:6460

  • kernel Rocky Linux 8 4.18.0-372.26.1.el8_6
  • kernel-rt Rocky Linux 8 4.18.0-372.26.1.rt7.183.el8_6

rocky linux advisories RLSA-2022:6460RLSA-2022:6437

  • xen Alpine 3.13 4.14.5-r2
  • xen Alpine 3.15, Alpine 3.14 4.15.2-r2
  • xen Alpine 3.16 4.16.1-r2
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 4.16.1-r3

alpine advisories ALPINE-CVE-2022-21166

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-2022-21166 updated cvss 5.5

hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW)

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, microcode_ctl, kernel-firmware, +2 more Red Hat Enterprise Linux 7 microcode_ctl Red Hat Enterprise Linux 8 microcode_ctl
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder (v. 9) kernel-debuginfo-common-s390x 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-x86_64 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-aarch64 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-ppc64le 5.14.0-162.6.1.el9_1
    fixed: vendor fix RHSA-2022:8267
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.36.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.36.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.36.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.36.1.el9_0
    fixed: vendor fix RHSA-2022:8973
  • Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-162.6.1.el9_1, kernel-devel-matched 5.14.0-162.6.1.el9_1, kernel-debug-devel-matched 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-s390x 5.14.0-162.6.1.el9_1, kernel-zfcpdump-devel-matched 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-x86_64 5.14.0-162.6.1.el9_1, +2 more
    fixed: vendor fix RHSA-2022:8267
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.36.1.el9_0, kernel-devel-matched 5.14.0-70.36.1.el9_0, kernel-debug-devel-matched 5.14.0-70.36.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.36.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.36.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.36.1.el9_0, +2 more
    fixed: vendor fix RHSA-2022:8973
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-372.26.1.el8_6, kernel 4.18.0-372.26.1.el8_6, bpftool 4.18.0-372.26.1.el8_6, kernel-core 4.18.0-372.26.1.el8_6, kernel-tools 4.18.0-372.26.1.el8_6, python3-perf 4.18.0-372.26.1.el8_6, +15 more
    fixed: vendor fix RHSA-2022:6460
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-162.6.1.el9_1, bpftool 5.14.0-162.6.1.el9_1, microcode_ctl 20220809-1.el9, kernel-core 5.14.0-162.6.1.el9_1, kernel-tools 5.14.0-162.6.1.el9_1, python3-perf 5.14.0-162.6.1.el9_1, +15 more
    fixed: vendor fix RHSA-2022:8267
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.93.1.el8_2, kernel 4.18.0-193.93.1.el8_2, bpftool 4.18.0-193.93.1.el8_2, kernel-core 4.18.0-193.93.1.el8_2, kernel-tools 4.18.0-193.93.1.el8_2, python3-perf 4.18.0-193.93.1.el8_2, +8 more
    fixed: vendor fix RHSA-2022:7279
show 20 more
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) perf 4.18.0-147.76.1.el8_1, kernel 4.18.0-147.76.1.el8_1, bpftool 4.18.0-147.76.1.el8_1, kernel-core 4.18.0-147.76.1.el8_1, kernel-tools 4.18.0-147.76.1.el8_1, python3-perf 4.18.0-147.76.1.el8_1, +9 more
    fixed: vendor fix RHSA-2022:6872
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) perf 4.18.0-193.93.1.el8_2, kernel 4.18.0-193.93.1.el8_2, bpftool 4.18.0-193.93.1.el8_2, kernel-core 4.18.0-193.93.1.el8_2, kernel-tools 4.18.0-193.93.1.el8_2, python3-perf 4.18.0-193.93.1.el8_2, +9 more
    fixed: vendor fix RHSA-2022:7279
  • Red Hat Enterprise Linux BaseOS EUS (v.8.4) perf 4.18.0-305.65.1.el8_4, kernel 4.18.0-305.65.1.el8_4, bpftool 4.18.0-305.65.1.el8_4, kernel-core 4.18.0-305.65.1.el8_4, kernel-tools 4.18.0-305.65.1.el8_4, python3-perf 4.18.0-305.65.1.el8_4, +15 more
    fixed: vendor fix RHSA-2022:6983
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.36.1.el9_0, bpftool 5.14.0-70.36.1.el9_0, kernel-core 5.14.0-70.36.1.el9_0, kernel-tools 5.14.0-70.36.1.el9_0, python3-perf 5.14.0-70.36.1.el9_0, kernel-modules 5.14.0-70.36.1.el9_0, +14 more
    fixed: vendor fix RHSA-2022:8973
  • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) perf 4.18.0-193.93.1.el8_2, kernel 4.18.0-193.93.1.el8_2, bpftool 4.18.0-193.93.1.el8_2, kernel-core 4.18.0-193.93.1.el8_2, kernel-tools 4.18.0-193.93.1.el8_2, python3-perf 4.18.0-193.93.1.el8_2, +8 more
    fixed: vendor fix RHSA-2022:7279
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, kernel-tools-libs 3.10.0-1160.76.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7
    fixed: vendor fix RHSA-2022:5937
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-372.26.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.26.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.26.1.el8_6
    fixed: vendor fix RHSA-2022:6460
  • Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-debuginfo-common-x86_64 4.18.0-305.65.1.el8_4, kernel-debuginfo-common-aarch64 4.18.0-305.65.1.el8_4, kernel-debuginfo-common-ppc64le 4.18.0-305.65.1.el8_4
    fixed: vendor fix RHSA-2022:6983
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.76.1.rt56.1220.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debug-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-trace-kvm 3.10.0-1160.76.1.rt56.1220.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.76.1.rt56.1220.el7
    fixed: vendor fix RHSA-2022:5939
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-kvm 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-core 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-modules 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-debug-kvm 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-debug-core 4.18.0-372.26.1.rt7.183.el8_6, +4 more
    fixed: vendor fix RHSA-2022:6437
  • Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-kvm 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-core 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-modules 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-debug-kvm 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-debug-core 4.18.0-305.65.1.rt7.137.el8_4, +4 more
    fixed: vendor fix RHSA-2022:6991
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules-extra 5.14.0-162.6.1.rt21.168.el9_1, +2 more
    fixed: vendor fix RHSA-2022:7933
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-core 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-modules 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-debug-core 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-debug-modules 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-modules-extra 5.14.0-70.36.1.rt21.108.el9_0, +2 more
    fixed: vendor fix RHSA-2022:8974
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-kvm 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-kvm 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-core 5.14.0-162.6.1.rt21.168.el9_1, +4 more
    fixed: vendor fix RHSA-2022:7933
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-kvm 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-core 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-modules 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-debug-kvm 5.14.0-70.36.1.rt21.108.el9_0, kernel-rt-debug-core 5.14.0-70.36.1.rt21.108.el9_0, +4 more
    fixed: vendor fix RHSA-2022:8974
  • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-kvm 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-core 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-modules 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-debug-kvm 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-debug-core 4.18.0-193.93.1.rt13.143.el8_2, +4 more Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-core 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-modules 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-debug-core 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-debug-modules 4.18.0-193.93.1.rt13.143.el8_2, kernel-rt-modules-extra 4.18.0-193.93.1.rt13.143.el8_2, +2 more
    fixed: vendor fix RHSA-2022:7280
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-core 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-modules 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-debug-core 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-debug-modules 4.18.0-372.26.1.rt7.183.el8_6, kernel-rt-modules-extra 4.18.0-372.26.1.rt7.183.el8_6, +2 more
    fixed: vendor fix RHSA-2022:6437
  • Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-core 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-modules 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-debug-core 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-debug-modules 4.18.0-305.65.1.rt7.137.el8_4, kernel-rt-modules-extra 4.18.0-305.65.1.rt7.137.el8_4, +2 more
    fixed: vendor fix RHSA-2022:6991
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-kdump 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.76.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.76.1.el7 Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.76.1.el7, kernel 3.10.0-1160.76.1.el7, bpftool 3.10.0-1160.76.1.el7, python-perf 3.10.0-1160.76.1.el7, kernel-tools 3.10.0-1160.76.1.el7, kernel-tools-libs 3.10.0-1160.76.1.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.76.1.el7
    fixed: vendor fix RHSA-2022:5937
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.26.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.26.1.el8_6
    fixed: vendor fix RHSA-2022:6460

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

cisa ICSA-23-166-11 updated cvss 5.5

Siemens SIMATIC S7-1500 TM MFP Linux Kernel

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

6.45% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • n/a Intel(R) Processors
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
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.