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Fencer Vulns
medium 5.5

CVE-2022-41218 json

In drivers/media/dvb-core/dmxdev.c in the Linux kernel through 5.19.10, there is a use-after-free caused by refcount races, affecting dvb_d…

published 2022-09-21 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-44459

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

In drivers/media/dvb-core/dmxdev.c in the Linux kernel through 5.19.10, there is a use-after-free caused by refcount races, affecting dvb_demux_open and dvb_dmxdev_release.

Patch / fix

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1
  • linux Debian 14, Debian 13, Debian 12 6.1.4-1

debian advisories DEBIAN-CVE-2022-41218

  • linux Ubuntu 18.04 LTS 4.15.0-208.220
  • linux Ubuntu 20.04 LTS 5.4.0-144.161
  • linux Ubuntu 22.04 LTS 5.15.0-69.76
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1153.166
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1097.105
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1033.37
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1101.110
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1031.38

ubuntu advisories UBUNTU-CVE-2022-41218

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 4.18.0-372.87.1.el8_6
  • kernel-rt RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-kvm RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-core RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-modules RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-kvm RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-core RHEL 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-modules RHEL 8 4.18.0-477.10.1.rt7.274.el8_8

red hat advisories RHSA-2024:0412RHSA-2023:2736RHSA-2023:2951

  • 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
  • dtb-aarch64 openSUSE Leap 15.4 5.14.21-150400.24.28.1
  • kernel-64kb SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.28.1
  • kernel-syms SLE Module for Development Tools 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.28.1
  • kernel-obs-qa openSUSE Leap 15.4 5.14.21-150400.24.28.1

suse advisories SUSE-SU-2023:0416-1SUSE-SU-2022:4617-1SUSE-SU-2022:4595-1SUSE-SU-2022:4587-1SUSE-SU-2022:4580-1SUSE-SU-2022:4577-1

  • kernel-source openSUSE Tumbleweed 5.19.12-1.1
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:12373-1openSUSE-SU-2024:13704-1

  • kernel-rt AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-kvm AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-core AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-modules AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-kvm AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-477.10.1.rt7.274.el8_8

almalinux advisories ALSA-2023:2736ALSA-2023:2951

  • kernel CBL-Mariner 2.0 5.15.92.1-1

azure linux advisories AZL-10984

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
  • linux Arch Linux 6.2-1

arch linux advisories AVG-2834AVG-2835AVG-2836AVG-2837

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-2022-41218 updated cvss 5.5

kernel: Report vmalloc UAF in dvb-core/dmxdev

  • 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 Enterprise Linux 9 kernel-rt, kernel-rt-selftests-internal
    affected: workaround, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.87.1.el8_6
    fixed: vendor fix RHSA-2024:0412
  • 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 EUS (v.8.6) perf 4.18.0-372.87.1.el8_6, kernel 4.18.0-372.87.1.el8_6, bpftool 4.18.0-372.87.1.el8_6, kernel-core 4.18.0-372.87.1.el8_6, kernel-tools 4.18.0-372.87.1.el8_6, python3-perf 4.18.0-372.87.1.el8_6, +15 more
    fixed: vendor fix RHSA-2024:0412
  • 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 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 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 Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.87.1.el8_6
    fixed: vendor fix RHSA-2024:0412
show 1 more
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 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 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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2022/09/23/4 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2022/09/24/1 referenced PoC, tagged "exploit" by a source, unverified

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

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.