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OpenAdvisories
Unscored CVE-2021-20321 EUVD-2021-7745

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with Ov…

Published Feb 18, 2022 · Updated Aug 3, 2024 · Assigned by redhat

Package: linux Package: linux Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 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-5.3 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-5.3 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-intel-5.13 Package: linux-intel-iot-realtime 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-5.3 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: Debian Ecosystem: Ubuntu

Description

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

Affected products

VendorProductAffectedFixed
— kernel kernel 5.15-rc5 —

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 5.14.12-1 —
Debian 13 linux 5.14.12-1 —
Debian 12 linux 5.14.12-1 —
Debian 10 linux 4.19.232-1 DSA-5096-1
Debian 9 linux 4.9.290-1 DLA-2843-1
Debian 9 linux-4.19 4.19.232-1~deb9u1 DLA-2941-1
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 5.4.0-92.103 USN-5210-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1061.64 USN-5210-1
Ubuntu 20.04 LTS linux-aws-5.11 +2 5.11.0-1023.24~20.04.1 USN-5208-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1065.68 USN-5210-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1023.26 USN-5210-1
Ubuntu 20.04 LTS linux-gcp +1 5.4.0-1059.63 USN-5210-1
Ubuntu 20.04 LTS linux-gcp-5.11 5.11.0-1024.26~20.04.1 USN-5208-1
Ubuntu 20.04 LTS linux-gke 5.4.0-1057.60 USN-5210-1
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1029.30 USN-5210-1
Ubuntu 20.04 LTS linux-hwe-5.11 5.11.0-44.48~20.04.2 USN-5208-1
Ubuntu 20.04 LTS linux-hwe-5.13 5.13.0-23.23~20.04.2 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1010.11 USN-5210-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1051.53 USN-5210-1
Ubuntu 20.04 LTS linux-oem-5.10 5.10.0-1051.53 —
Ubuntu 20.04 LTS linux-oem-5.13 5.13.0-1026.32 USN-5218-1
Ubuntu 20.04 LTS linux-oem-5.14 5.14.0-1007.7 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1048.53 USN-5210-1
Ubuntu 20.04 LTS linux-riscv +9 No fix yet —
Ubuntu 20.04 LTS linux-riscv-5.11 5.11.0-1024.25~20.04.1 —
Ubuntu 18.04 LTS linux 4.15.0-166.174 USN-5209-1
Ubuntu 18.04 LTS linux-aws 4.15.0-1118.125 USN-5209-1
Ubuntu 18.04 LTS linux-aws-5.4 5.4.0-1061.64~18.04.1 USN-5210-1
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1129.142 USN-5209-1
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1065.68~18.04.1 USN-5210-1
Ubuntu 18.04 LTS linux-dell300x 4.15.0-1033.38 USN-5209-1
Ubuntu 18.04 LTS linux-gcp +12 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1114.128 USN-5209-1
Ubuntu 18.04 LTS linux-gcp-5.4 +1 5.4.0-1059.63~18.04.1 USN-5210-1
Ubuntu 18.04 LTS linux-gke-5.4 5.4.0-1057.60~18.04.1 USN-5210-1
Ubuntu 18.04 LTS linux-gkeop-5.4 5.4.0-1029.30~18.04.2 USN-5210-1
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-92.103~18.04.2 USN-5210-1
Ubuntu 18.04 LTS linux-kvm 4.15.0-1105.107 USN-5209-1
Ubuntu 18.04 LTS linux-oracle 4.15.0-1085.93 USN-5209-1
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1048.53~18.04.1 USN-5210-1
Ubuntu 18.04 LTS linux-raspi2 4.15.0-1101.108 USN-5209-1
Ubuntu 18.04 LTS linux-snapdragon 4.15.0-1118.127 USN-5209-1
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 5.4.0-1069.73+fips2 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1073.76+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1038.44 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1067.71~20.04.1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2059.61 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2041.45 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1075.84 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2024.26 —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips 4.4.0-1090.97 —
Ubuntu Pro 16.04 LTS linux 4.4.0-242.276 USN-6221-1
Ubuntu Pro 16.04 LTS linux-aws 4.4.0-1158.173 USN-6221-1
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1118.125~16.04.1 USN-5209-1
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1129.142~16.04.1 USN-5209-1
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1114.128~16.04.1 USN-5209-1
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-166.174~16.04.1 USN-5209-1
Ubuntu Pro 16.04 LTS linux-kvm 4.4.0-1121.131 USN-6221-1
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1085.93~16.04.1 USN-5209-1
Ubuntu Pro 14.04 LTS linux No fix yet —
Ubuntu Pro 14.04 LTS linux-aws 4.4.0-1120.126 USN-6221-1
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1129.142~14.04.1 USN-5209-1
Ubuntu Pro 14.04 LTS linux-lts-xenial 4.4.0-242.276~14.04.1 USN-6221-1
ReleasePackageFixed inAdvisory
RHEL 8 kernel-rt +12 4.18.0-348.7.1.rt7.137.el8_5 RHSA-2021:5241
RHEL 8 perf +27 4.18.0-348.7.1.el8_5 RHSA-2021:5227

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 kernel-tools-libs-devel 4.18.0-348.7.1.el8_5 ALSA-2021:5227

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-348.7.1.el8_5 RLSA-2021:5227
Rocky Linux 8 kernel-rt 4.18.0-348.7.1.rt7.137.el8_5 RLSA-2021:5241
ReleasePackageFixed inAdvisory
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
SLES 15 SP3 kernel-azure +2 5.3.18-150300.38.56.1 SUSE-SU-2022:1676-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.68.1.150300.18.41.3 SUSE-SU-2022:1687-1
SLES 15 SP2 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SLES 15 SP2 kernel-docs +5 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SLES 15 SP1 kernel-docs +5 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
SLES 15 kernel-docs +6 4.12.14-150000.150.92.2 SUSE-SU-2022:2103-1
SLES 12 SP5 kernel-azure +2 4.12.14-16.97.1 SUSE-SU-2022:1651-1
SLES 12 SP5 kernel-docs +3 4.12.14-122.121.2 SUSE-SU-2022:1686-1
SLES 12 SP5 kernel-obs-build 4.12.14-122.121.1 SUSE-SU-2022:1686-1
Show 33 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP4 kernel-default 4.12.14-95.99.3 SUSE-SU-2022:2083-1
SLES 12 SP4 kernel-syms +1 4.12.14-95.99.2 SUSE-SU-2022:2083-1
SLES 12 SP3 kernel-default 4.4.180-94.164.3 SUSE-SU-2022:2082-1
SLES 12 SP3 kernel-syms +1 4.4.180-94.164.2 SUSE-SU-2022:2082-1
SLES 12 SP3 kgraft-patch-SLE12-SP3_Update_45 1-4.3.2 SUSE-SU-2022:2082-1
SLES 12 SP2 kernel-syms +2 4.4.121-92.175.2 SUSE-SU-2022:2077-1
SLES for SAP 15 SP2 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SLES for SAP 15 SP2 kernel-docs +5 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SLES for SAP 15 SP1 kernel-docs +4 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
SLES for SAP 15 kernel-docs +5 4.12.14-150000.150.92.2 SUSE-SU-2022:2103-1
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.97.1 SUSE-SU-2022:1651-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.121.2 SUSE-SU-2022:1686-1
SLES for SAP 12 SP4 kernel-default 4.12.14-95.99.3 SUSE-SU-2022:2083-1
SLES for SAP 12 SP4 kernel-syms +1 4.12.14-95.99.2 SUSE-SU-2022:2083-1
SLES for SAP 12 SP3 kernel-default 4.4.180-94.164.3 SUSE-SU-2022:2082-1
SLES for SAP 12 SP3 kernel-syms +1 4.4.180-94.164.2 SUSE-SU-2022:2082-1
SLES for SAP 12 SP3 kgraft-patch-SLE12-SP3_Update_45 1-4.3.2 SUSE-SU-2022:2082-1
SLE Real Time 15 SP3 release-notes-sle_rt 15.3.20220422-150300.3.3.2 SUSE-SU-2022:1669-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.89.1 SUSE-SU-2022:1668-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.68.1.150300.18.41.3 SUSE-SU-2022:1687-1
SLE Micro 5.2 kernel-rt 5.3.18-150300.88.2 SUSE-SU-2022:1669-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.68.1.150300.18.41.3 SUSE-SU-2022:1687-1
SLE Micro 5.1 kernel-rt 5.3.18-150300.88.2 SUSE-SU-2022:1669-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_18 1-150300.7.5.1 SUSE-SU-2022:1687-1
SLE Live Patching 15 SP2 kernel-default 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_27 1-150200.5.3.1 SUSE-SU-2022:2104-1
SLE Live Patching 15 SP1 kernel-default 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
SLE Live Patching 15 SP1 kernel-livepatch-SLE15-SP1_Update_31 1-150100.3.3.2 SUSE-SU-2022:2111-1
SLE Live Patching 15 kernel-default 4.12.14-150000.150.92.2 SUSE-SU-2022:2103-1
SLE Live Patching 15 kernel-livepatch-SLE15_Update_30 1-150000.1.3.2 SUSE-SU-2022:2103-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.121.2 SUSE-SU-2022:1686-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_31 1-8.5.2 SUSE-SU-2022:1686-1
SLE Live Patching 12 SP4 kernel-default 4.12.14-95.99.3 SUSE-SU-2022:2083-1
SLE Live Patching 12 SP4 kgraft-patch-SLE12-SP4_Update_27 1-6.3.3 SUSE-SU-2022:2083-1
SLE HPC 15 SP2 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SLE HPC 15 SP2 kernel-docs +5 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SLE HPC 15 SP1 kernel-docs +4 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
SLE HPC 15 kernel-docs +5 4.12.14-150000.150.92.2 SUSE-SU-2022:2103-1
SUSE Real Time Module 15 SP3 kernel-rt +2 5.3.18-150300.88.2 SUSE-SU-2022:1669-1
SUSE Real Time Module 15 SP3 kernel-syms-rt 5.3.18-150300.88.1 SUSE-SU-2022:1669-1
SUSE Real Time Module 15 SP3 release-notes-sle_rt 15.3.20220422-150300.3.3.2 SUSE-SU-2022:1669-1
SUSE OpenStack Cloud Crowbar 9 kernel-default 4.12.14-95.99.3 SUSE-SU-2022:2083-1
SUSE OpenStack Cloud Crowbar 9 kernel-syms +1 4.12.14-95.99.2 SUSE-SU-2022:2083-1
SUSE OpenStack Cloud Crowbar 8 kernel-default 4.4.180-94.164.3 SUSE-SU-2022:2082-1
SUSE OpenStack Cloud Crowbar 8 kernel-syms +1 4.4.180-94.164.2 SUSE-SU-2022:2082-1
SUSE OpenStack Cloud Crowbar 8 kgraft-patch-SLE12-SP3_Update_45 1-4.3.2 SUSE-SU-2022:2082-1
SUSE OpenStack Cloud 9 kernel-default 4.12.14-95.99.3 SUSE-SU-2022:2083-1
SUSE OpenStack Cloud 9 kernel-syms +1 4.12.14-95.99.2 SUSE-SU-2022:2083-1
SUSE OpenStack Cloud 8 kernel-default 4.4.180-94.164.3 SUSE-SU-2022:2082-1
SUSE OpenStack Cloud 8 kernel-syms +1 4.4.180-94.164.2 SUSE-SU-2022:2082-1
SUSE OpenStack Cloud 8 kgraft-patch-SLE12-SP3_Update_45 1-4.3.2 SUSE-SU-2022:2082-1
SUSE Manager Server 4.1 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SUSE Manager Server 4.1 kernel-docs +5 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SUSE Manager Retail Branch Server 4.1 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SUSE Manager Retail Branch Server 4.1 kernel-docs +4 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SUSE Manager Proxy 4.1 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SUSE Manager Proxy 4.1 kernel-docs +4 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SUSE HPE Helion OpenStack 8 kernel-default 4.4.180-94.164.3 SUSE-SU-2022:2082-1
SUSE HPE Helion OpenStack 8 kernel-syms +1 4.4.180-94.164.2 SUSE-SU-2022:2082-1
SUSE HPE Helion OpenStack 8 kgraft-patch-SLE12-SP3_Update_45 1-4.3.2 SUSE-SU-2022:2082-1
SUSE Enterprise Storage 7 kernel-default-base 5.3.18-150200.24.115.1.150200.9.54.1 SUSE-SU-2022:2104-1
SUSE Enterprise Storage 7 kernel-docs +5 5.3.18-150200.24.115.1 SUSE-SU-2022:2104-1
SUSE Enterprise Storage 6 kernel-docs +4 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.4 dtb-aarch64 +1 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
openSUSE Leap 15.4 kernel-debug +4 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1
openSUSE Leap 15.3 dtb-aarch64 +7 5.3.18-150300.59.68.1 SUSE-SU-2022:1687-1
openSUSE Leap 15.3 kernel-azure +2 5.3.18-150300.38.56.1 SUSE-SU-2022:1676-1
openSUSE Leap 15.3 kernel-debug +4 4.12.14-150100.197.114.2 SUSE-SU-2022:2111-1, SUSE-SU-2022:1687-1
openSUSE Leap 15.3 kernel-default-base 5.3.18-150300.59.68.1.150300.18.41.3 SUSE-SU-2022:1687-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 kernel-livepatch-4.14.252-195.481 1.0-0.amzn2 ALAS2-2021-1719
Amazon Linux 2 perf +8 4.14.252-195.481.amzn2 ALAS2-2021-1719

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 perf +19 4.18.0-348.7.1.el8_5 ELSA-2021-5227
Oracle Linux 7 kernel-uek +5 4.1.12-124.60.1.el7uek ELSA-2022-9088

Advisories 31

References