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OpenAdvisories
Unscored CVE-2021-4197 EUVD-2021-34056

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users hav…

Published Mar 23, 2022 · Updated Aug 3, 2024 · Assigned by redhat

Package: kernel Package: linux Package: linux Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-edge Package: linux-azure-fips Package: linux-bluefield Package: linux-dell300x Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-iot Package: linux-kvm Package: linux-lts-xenial Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.6 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.8 Package: linux-snapdragon Package: linux-vmware Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Affected products

VendorProductAffectedFixed
— kernel Linux kernel 5.17-rc1 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 5.15.15-1 —
Debian 13 linux 5.15.15-1 —
Debian 12 linux 5.15.15-1 —
Debian 11 linux 5.10.113-1 DSA-5127-1
Debian 10 linux 4.19.249-2 DSA-5173-1
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux-realtime +1 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-117.132 USN-5467-1
Ubuntu 20.04 LTS linux-aws +1 5.4.0-1078.84 USN-5467-1
Ubuntu 20.04 LTS linux-aws-5.13 5.13.0-1019.21~20.04.1 USN-5337-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1083.87 USN-5467-1
Ubuntu 20.04 LTS linux-azure-5.13 5.13.0-1021.24~20.04.1 USN-5368-1
Ubuntu 20.04 LTS linux-azure-fde 5.4.0-1083.87+cvm1.1 USN-5467-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1040.44 —
Ubuntu 20.04 LTS linux-gcp-5.13 5.13.0-1021.25~20.04.1 USN-5337-1
Ubuntu 20.04 LTS linux-gke 5.4.0-1074.79 USN-5467-1
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1046.48 USN-5467-1
Ubuntu 20.04 LTS linux-hwe-5.13 5.13.0-37.42~20.04.1 USN-5337-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1026.29 USN-5467-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1004.6 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1068.72 USN-5467-1
Ubuntu 20.04 LTS linux-oem-5.14 5.14.0-1022.24 USN-5278-1
Ubuntu 20.04 LTS linux-oracle 5.4.0-1076.83 USN-5467-1
Ubuntu 20.04 LTS linux-oracle-5.13 5.13.0-1025.30~20.04.1 USN-5368-1
Ubuntu 20.04 LTS linux-raspi 5.4.0-1065.75 USN-5467-1
Ubuntu 20.04 LTS linux-riscv +17 No fix yet —
Ubuntu 18.04 LTS linux 4.15.0-189.200 USN-5515-1
Ubuntu 18.04 LTS linux-aws 4.15.0-1137.148 USN-5515-1
Ubuntu 18.04 LTS linux-aws-5.4 +1 5.4.0-1078.84~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1146.161 USN-5515-1
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1083.87~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-dell300x 4.15.0-1049.54 USN-5515-1
Ubuntu 18.04 LTS linux-gcp +12 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1131.147 USN-5515-1
Ubuntu 18.04 LTS linux-gke-5.4 5.4.0-1074.79~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-gkeop-5.4 5.4.0-1046.48~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-117.132~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-ibm-5.4 5.4.0-1028.32~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-kvm 4.15.0-1123.128 USN-5515-1
Ubuntu 18.04 LTS linux-oracle 4.15.0-1102.113 USN-5515-1
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1076.83~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1065.75~18.04.1 USN-5467-1
Ubuntu 18.04 LTS linux-raspi2 4.15.0-1115.123 USN-5515-1
Ubuntu 18.04 LTS linux-snapdragon 4.15.0-1133.143 USN-5515-1
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 8 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips +1 5.4.0-1078.84+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1083.87+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1054.61 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2076.81 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2057.63 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1094.105 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2041.46 —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips 4.4.0-1079.86 —
Ubuntu Pro 16.04 LTS linux 4.4.0-229.263 USN-5500-1
Ubuntu Pro 16.04 LTS linux-aws 4.4.0-1145.160 USN-5500-1
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1137.148~16.04.1 USN-5515-1
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1146.161~16.04.1 USN-5541-1
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1131.147~16.04.1 USN-5515-1
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-189.200~16.04.1 USN-5515-1
Ubuntu Pro 16.04 LTS linux-kvm 4.4.0-1110.120 USN-5505-1
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1102.113~16.04.1 USN-5515-1
Ubuntu Pro 14.04 LTS linux-aws 4.4.0-1109.115 USN-5513-1
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1146.161~14.04.1 USN-5515-1
Ubuntu Pro 14.04 LTS linux-lts-xenial 4.4.0-229.263~14.04.1 USN-5505-1
ReleasePackageFixed inAdvisory
RHEL 8 kernel-rt +12 4.18.0-372.9.1.rt7.166.el8 RHSA-2022:1975
RHEL 8 perf +26 4.18.0-372.9.1.el8 RHSA-2022:1988
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 8.4 EUS kernel-rt +12 4.18.0-305.57.1.rt7.129.el8_4 RHSA-2022:5633
RHEL 8.4 EUS perf +26 4.18.0-305.57.1.el8_4 RHSA-2022:5626

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 perf +19 4.18.0-372.9.1.el8 ALSA-2022:1988

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-372.9.1.el8 RLSA-2022:1988
Rocky Linux 8 kernel-rt 4.18.0-372.9.1.rt7.166.el8 RLSA-2022:1975
ReleasePackageFixed inAdvisory
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.43.1 SUSE-SU-2022:0198-1
SLES 15 SP3 kernel-azure +2 5.3.18-150300.38.37.1 SUSE-SU-2022:0169-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.43.1.150300.18.27.1 SUSE-SU-2022:0198-1
SLES 15 SP2 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SLES 15 SP2 kernel-docs +5 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SLES 15 SP1 kernel-docs +5 4.12.14-197.105.1 SUSE-SU-2022:0366-1
SLES 15 kernel-docs +6 4.12.14-150.83.1 SUSE-SU-2022:0367-1
SLES 12 SP5 kernel-azure +2 4.12.14-16.88.1 SUSE-SU-2022:0372-1
SLES 12 SP5 kernel-docs 4.12.14-122.110.2 SUSE-SU-2022:0364-1
SLES 12 SP5 kernel-syms +3 4.12.14-122.110.1 SUSE-SU-2022:0364-1
Show 33 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP4 kernel-syms +2 4.12.14-95.88.1 SUSE-SU-2022:0371-1
SLES 12 SP3 kernel-syms +2 4.4.180-94.153.1 SUSE-SU-2022:0362-1
SLES 12 SP3 kgraft-patch-SLE12-SP3_Update_42 1-4.3.1 SUSE-SU-2022:0362-1
SLES 12 SP2 kernel-syms +2 4.4.121-92.164.1 SUSE-SU-2022:0477-1
SLES for SAP 15 SP2 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SLES for SAP 15 SP2 kernel-docs +5 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SLES for SAP 15 SP1 kernel-docs +4 4.12.14-197.105.1 SUSE-SU-2022:0366-1
SLES for SAP 15 kernel-docs +5 4.12.14-150.83.1 SUSE-SU-2022:0367-1
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.88.1 SUSE-SU-2022:0372-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.110.1 SUSE-SU-2022:0364-1
SLES for SAP 12 SP4 kernel-syms +2 4.12.14-95.88.1 SUSE-SU-2022:0371-1
SLES for SAP 12 SP3 kernel-syms +2 4.4.180-94.153.1 SUSE-SU-2022:0362-1
SLES for SAP 12 SP3 kgraft-patch-SLE12-SP3_Update_42 1-4.3.1 SUSE-SU-2022:0362-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.78.1 SUSE-SU-2022:0555-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.43.1 SUSE-SU-2022:0198-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.43.1.150300.18.27.1 SUSE-SU-2022:0198-1
SLE Micro 5.1 kernel-rt 5.3.18-150300.71.1 SUSE-SU-2022:0288-1
SLE Micro 5.0 kernel-default 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SLE Micro 5.0 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SLE Micro 5.0 kernel-rt 5.3.18-68.1 SUSE-SU-2022:0289-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.43.1 SUSE-SU-2022:0198-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_12 1-150300.7.3.1 SUSE-SU-2022:0198-1
SLE Live Patching 15 SP2 kernel-default 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_23 1-5.3.1 SUSE-SU-2022:0197-1
SLE Live Patching 15 SP1 kernel-default 4.12.14-197.105.1 SUSE-SU-2022:0366-1
SLE Live Patching 15 SP1 kernel-livepatch-SLE15-SP1_Update_28 1-3.3.1 SUSE-SU-2022:0366-1
SLE Live Patching 15 kernel-default 4.12.14-150.83.1 SUSE-SU-2022:0367-1
SLE Live Patching 15 kernel-livepatch-SLE15_Update_27 1-1.5.1 SUSE-SU-2022:0367-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.110.1 SUSE-SU-2022:0364-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_28 1-8.3.2 SUSE-SU-2022:0364-1
SLE Live Patching 12 SP4 kernel-default 4.12.14-95.88.1 SUSE-SU-2022:0371-1
SLE Live Patching 12 SP4 kgraft-patch-SLE12-SP4_Update_24 1-6.5.1 SUSE-SU-2022:0371-1
SLE HPC 15 SP2 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SLE HPC 15 SP2 kernel-docs +5 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SLE HPC 15 SP1 kernel-docs +4 4.12.14-197.105.1 SUSE-SU-2022:0366-1
SLE HPC 15 kernel-docs +5 4.12.14-150.83.1 SUSE-SU-2022:0367-1
SUSE Real Time Module 15 SP3 kernel-rt +3 5.3.18-150300.71.1 SUSE-SU-2022:0288-1
SUSE Real Time Module 15 SP2 kernel-rt +3 5.3.18-68.1 SUSE-SU-2022:0289-1
SUSE OpenStack Cloud Crowbar 9 kernel-syms +2 4.12.14-95.88.1 SUSE-SU-2022:0371-1
SUSE OpenStack Cloud Crowbar 8 kernel-syms +2 4.4.180-94.153.1 SUSE-SU-2022:0362-1
SUSE OpenStack Cloud Crowbar 8 kgraft-patch-SLE12-SP3_Update_42 1-4.3.1 SUSE-SU-2022:0362-1
SUSE OpenStack Cloud 9 kernel-syms +2 4.12.14-95.88.1 SUSE-SU-2022:0371-1
SUSE OpenStack Cloud 8 kernel-syms +2 4.4.180-94.153.1 SUSE-SU-2022:0362-1
SUSE OpenStack Cloud 8 kgraft-patch-SLE12-SP3_Update_42 1-4.3.1 SUSE-SU-2022:0362-1
SUSE Manager Server 4.1 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SUSE Manager Server 4.1 kernel-docs +5 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SUSE Manager Retail Branch Server 4.1 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SUSE Manager Retail Branch Server 4.1 kernel-docs +4 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SUSE Manager Proxy 4.1 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SUSE Manager Proxy 4.1 kernel-docs +4 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SUSE HPE Helion OpenStack 8 kernel-syms +2 4.4.180-94.153.1 SUSE-SU-2022:0362-1
SUSE HPE Helion OpenStack 8 kgraft-patch-SLE12-SP3_Update_42 1-4.3.1 SUSE-SU-2022:0362-1
SUSE Enterprise Storage 7 kernel-default-base 5.3.18-24.99.1.9.46.1 SUSE-SU-2022:0197-1
SUSE Enterprise Storage 7 kernel-docs +5 5.3.18-24.99.1 SUSE-SU-2022:0197-1
SUSE Enterprise Storage 6 kernel-docs +4 4.12.14-197.105.1 SUSE-SU-2022:0366-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.3 dtb-aarch64 +7 5.3.18-150300.59.43.1 openSUSE-SU-2022:0198-1
openSUSE Leap 15.3 kernel-azure +2 5.3.18-150300.38.37.1 openSUSE-SU-2022:0169-1
openSUSE Leap 15.3 kernel-debug +4 4.12.14-197.105.1 openSUSE-SU-2022:0366-1, openSUSE-SU-2022:0198-1
openSUSE Leap 15.3 kernel-default-base 5.3.18-150300.59.43.1.150300.18.27.1 openSUSE-SU-2022:0198-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 kernel-livepatch-4.14.268-205.500 1.0-0.amzn2 ALAS2-2022-1761
Amazon Linux 2 perf +8 4.14.268-205.500.amzn2 ALAS2-2022-1761

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.37.1-2 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 perf +19 4.18.0-372.9.1.el8 ELSA-2022-1988
Oracle Linux 7 kernel-uek +4 5.4.17-2136.308.7.el8uek ELSA-2022-9479
Oracle Linux 7 kernel-uek-container +1 5.4.17-2136.308.7.el8 ELSA-2022-9480
Oracle Linux 7 perf +3 5.4.17-2136.308.7.el7uek ELSA-2022-9479

Advisories 39

References