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Fencer Intel
medium 6.7

CVE-2022-21505 json

In the linux kernel, if IMA appraisal is used with the "ima_appraise=log" boot param, lockdown can be defeated with kexec on any machine wh…

published last yr. modified 26d ago also EUVD-2022-26729

cvss
6.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

In the linux kernel, if IMA appraisal is used with the "ima_appraise=log" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting "ima_appraise=log" from the boot param when Secure Boot is enabled, but this does not cover cases where lockdown is used without Secure Boot. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity, Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Patch / fix

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1
  • linux Debian 14, Debian 13, Debian 12 5.18.16-1

debian advisories DEBIAN-CVE-2022-21505

  • linux Ubuntu 20.04 LTS 5.4.0-128.144
  • linux Ubuntu 22.04 LTS 5.15.0-50.56
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1086.93
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1021.25
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1090.98
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1019.25
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1084.90
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1017.20

ubuntu advisories UBUNTU-CVE-2022-21505

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 9 5.14.0-284.11.1.el9_2
  • perf RHEL 9 5.14.0-284.11.1.el9_2
  • rtla RHEL 9 5.14.0-284.11.1.el9_2
  • bpftool RHEL 9 7.0.0-284.11.1.el9_2
  • kernel-64k RHEL 9 5.14.0-284.11.1.el9_2
  • kernel-core RHEL 9 5.14.0-284.11.1.el9_2
  • kernel-tools RHEL 9 5.14.0-284.11.1.el9_2
  • python3-perf RHEL 9 5.14.0-284.11.1.el9_2

red hat advisories RHSA-2023:2458RHSA-2023:2148

  • kernel-rt SLE Micro 5.2, SLE Micro 5.1, Real Time Module 15 SP3 +1 more 5.3.18-150300.99.1
  • kernel-syms-rt Real Time Module 15 SP3 5.3.18-150300.99.1
  • kernel-rt_debug Real Time Module 15 SP3 5.3.18-150300.99.1
  • kernel-source-rt Real Time Module 15 SP3 5.3.18-150300.99.1
  • kernel-default SLE Workstation Extension 15 SP3, SLE Module for Legacy 15 SP3, SLE Module for Basesystem 15 SP3 +6 more 5.3.18-150300.59.90.1
  • kernel-default-base SLE Module for Basesystem 15 SP3, SLE Micro 5.2, SLE Micro 5.1 +2 more 5.3.18-150300.59.90.1.150300.18.52.1
  • dtb-aarch64 openSUSE Leap 15.4, openSUSE Leap 15.3 5.3.18-150300.59.90.1
  • kernel-64kb SLE Module for Basesystem 15 SP3, openSUSE Leap 15.3 5.3.18-150300.59.90.1

suse advisories SUSE-SU-2022:2892-2SUSE-SU-2022:2892-1SUSE-SU-2022:2875-2SUSE-SU-2022:2875-1SUSE-SU-2022:2809-1SUSE-SU-2022:2803-1

  • kernel-rt AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-kvm AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-core AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-modules AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-debug-kvm AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-debug-core AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-modules-core AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2
  • kernel-rt-debug-modules AlmaLinux 9 5.14.0-284.11.1.rt14.296.el9_2

almalinux advisories ALSA-2023:2148ALSA-2023:2458

Is CVE-2022-21505 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-2022-21505 updated cvss 6.7

kernel: lockdown bypass using IMA

  • Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-284.11.1.el9_2, rtla 5.14.0-284.11.1.el9_2, kernel-devel-matched 5.14.0-284.11.1.el9_2, kernel-64k-devel-matched 5.14.0-284.11.1.el9_2, kernel-debug-devel-matched 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, +5 more Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.0.0-284.11.1.el9_2, kernel 5.14.0-284.11.1.el9_2, kernel-64k 5.14.0-284.11.1.el9_2, kernel-core 5.14.0-284.11.1.el9_2, kernel-tools 5.14.0-284.11.1.el9_2, python3-perf 5.14.0-284.11.1.el9_2, +28 more Red Hat Enterprise Linux CRB (v. 9) kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.11.1.el9_2
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-kvm 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-kvm 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-core 5.14.0-284.11.1.rt14.296.el9_2, +6 more Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-modules-core 5.14.0-284.11.1.rt14.296.el9_2, kernel-rt-debug-modules 5.14.0-284.11.1.rt14.296.el9_2, +4 more
    fixed: vendor fix RHSA-2023:2148
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    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

cisa ICSA-23-166-11 updated cvss 6.7

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
total
Assessed
last yr.

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Oracle Corporation Oracle Linux
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
Technology feeds

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.