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Fencer Vulns
medium 5.5

CVE-2022-36879 json

An issue was discovered in the Linux kernel through 5.18.14.

published 2022-07-27 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-39579

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice.

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-2022-36879

  • linux Ubuntu 18.04 LTS 4.15.0-197.208
  • linux Ubuntu 20.04 LTS 5.4.0-128.144
  • linux Ubuntu 22.04 LTS 5.15.0-50.56
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1143.155
  • 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

ubuntu advisories UBUNTU-CVE-2022-36879

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

  • perf rhev hypervisor 4.4, RHEL 8.6 EUS 4.18.0-372.75.1.el8_6
  • 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

red hat advisories RHSA-2023:5627RHSA-2024:0431RHSA-2024:0432RHSA-2023:2458RHSA-2023:2148RHSA-2023:2736

  • kernel-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
  • kernel-syms-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
  • kernel-rt_debug Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
  • kernel-source-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.5.1
  • kernel-rt SLE Micro 5.2, SLE Micro 5.1, Real Time Module 15 SP3 +1 more 5.3.18-150300.106.1
  • kernel-syms-rt Real Time Module 15 SP3 5.3.18-150300.106.1
  • kernel-rt_debug Real Time Module 15 SP3 5.3.18-150300.106.1
  • kernel-source-rt Real Time Module 15 SP3 5.3.18-150300.106.1

suse advisories SUSE-SU-2023:0416-1SUSE-SU-2022:4617-1SUSE-SU-2022:3809-1SUSE-SU-2022:3609-1SUSE-SU-2022:3450-1SUSE-SU-2022:3422-1

  • kernel CBL-Mariner 2.0 5.15.67.1-4

azure linux advisories AZL-10401

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • linux-lts Arch Linux 6.2-1
  • linux-hardened Arch Linux 6.2-1
  • linux-zen Arch Linux 6.2-1

arch linux advisories AVG-2834AVG-2835AVG-2836

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-2022-36879 updated cvss 5.5

kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice

  • 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
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.75.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.75.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.75.1.el8_6
    fixed: vendor fix RHSA-2023:5627
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.85.1.el9_0
    fixed: vendor fix RHSA-2024:0432
  • 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
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.85.1.el9_0, kernel-devel-matched 5.14.0-70.85.1.el9_0, kernel-debug-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, +2 more
    fixed: vendor fix RHSA-2024:0432
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-477.10.1.el8_8, kernel 4.18.0-477.10.1.el8_8, bpftool 4.18.0-477.10.1.el8_8, kernel-core 4.18.0-477.10.1.el8_8, kernel-tools 4.18.0-477.10.1.el8_8, python3-perf 4.18.0-477.10.1.el8_8, +15 more
    fixed: vendor fix RHSA-2023:2951
  • 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
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.75.1.el8_6, kernel 4.18.0-372.75.1.el8_6, bpftool 4.18.0-372.75.1.el8_6, kernel-core 4.18.0-372.75.1.el8_6, kernel-tools 4.18.0-372.75.1.el8_6, python3-perf 4.18.0-372.75.1.el8_6, +15 more
    fixed: vendor fix RHSA-2023:5627
show 9 more
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.85.1.el9_0, bpftool 5.14.0-70.85.1.el9_0, kernel-core 5.14.0-70.85.1.el9_0, kernel-tools 5.14.0-70.85.1.el9_0, python3-perf 5.14.0-70.85.1.el9_0, kernel-modules 5.14.0-70.85.1.el9_0, +14 more
    fixed: vendor fix RHSA-2024:0432
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-477.10.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.10.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.10.1.el8_8
    fixed: vendor fix RHSA-2023:2951
  • 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. 8) kernel-rt 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-kvm 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-kvm 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-core 4.18.0-477.10.1.rt7.274.el8_8, +4 more
    fixed: vendor fix RHSA-2023:2736
  • 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
    fixed: vendor fix RHSA-2023:2148
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules-extra 5.14.0-70.85.1.rt21.156.el9_0, +2 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, +4 more
    fixed: vendor fix RHSA-2024:0431
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-core 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-modules 4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-modules-extra 4.18.0-477.10.1.rt7.274.el8_8, +2 more
    fixed: vendor fix RHSA-2023:2736
  • 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 Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.75.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.75.1.el8_6
    fixed: vendor fix RHSA-2023:5627

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 ICSA-23-075-01 updated cvss 5.5

Siemens SCALANCE, RUGGEDCOM Third-Party

  • Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) <V7.2 Siemens RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2) <V7.2 Siemens SCALANCE M804PB (6GK5804-0AP00-2AA2) <V7.2 Siemens SCALANCE M812-1 ADSL-Router (Annex A) (6GK5812-1AA00-2AA2) <V7.2 Siemens SCALANCE M812-1 ADSL-Router (Annex B) (6GK5812-1BA00-2AA2) <V7.2 Siemens SCALANCE M816-1 ADSL-Router (Annex A) (6GK5816-1AA00-2AA2) <V7.2
    +14 more products
    Siemens SCALANCE M816-1 ADSL-Router (Annex B) (6GK5816-1BA00-2AA2) <V7.2 Siemens SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2) <V7.2 Siemens SCALANCE M874-2 (6GK5874-2AA00-2AA2) <V7.2 Siemens SCALANCE M874-3 (6GK5874-3AA00-2AA2) <V7.2 Siemens SCALANCE M876-3 (EVDO) (6GK5876-3AA02-2BA2) <V7.2 Siemens SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2) <V7.2 Siemens SCALANCE M876-4 (6GK5876-4AA10-2BA2) <V7.2 Siemens SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2) <V7.2 Siemens SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2) <V7.2 Siemens SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1) <V7.2 Siemens SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1) <V7.2 Siemens SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1) <V7.2 Siemens SCALANCE S615 (6GK5615-0AA00-2AA2) <V7.2 Siemens SCALANCE S615 EEC (6GK5615-0AA01-2AA2) <V7.2
    affected: fixed in V7.2 support.industry.siemens.com

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

0.32% chance of exploitation in the next 30 days, higher than 25% 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:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

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

Classification

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.