First published: Thu Aug 12 2021(Updated: )
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.
Credit: secalert@redhat.com secalert@redhat.com
Affected Software | Affected Version | How to fix |
---|---|---|
redhat/kernel-rt | <0:4.18.0-348.rt7.130.el8 | 0:4.18.0-348.rt7.130.el8 |
redhat/kernel | <0:4.18.0-348.el8 | 0:4.18.0-348.el8 |
Linux Linux kernel | <5.14 | |
Linux Linux kernel | =5.14 | |
Linux Linux kernel | =5.14-rc1 | |
Linux Linux kernel | =5.14-rc2 | |
Linux Linux kernel | =5.14-rc3 | |
Linux Linux kernel | =5.14-rc4 | |
Linux Linux kernel | =5.14-rc5 | |
redhat/kernel | <5.14 | 5.14 |
ubuntu/linux | <4.15.0-159.167 | 4.15.0-159.167 |
ubuntu/linux | <5.4.0-89.100 | 5.4.0-89.100 |
ubuntu/linux | <5.11.0-38.42 | 5.11.0-38.42 |
ubuntu/linux | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux | <4.4.0-239.273 | 4.4.0-239.273 |
ubuntu/linux-aws | <4.15.0-1112.119 | 4.15.0-1112.119 |
ubuntu/linux-aws | <5.4.0-1058.61 | 5.4.0-1058.61 |
ubuntu/linux-aws | <5.11.0-1020.21 | 5.11.0-1020.21 |
ubuntu/linux-aws | <4.4.0-1117.123 | 4.4.0-1117.123 |
ubuntu/linux-aws | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws | <4.4.0-1155.170 | 4.4.0-1155.170 |
ubuntu/linux-aws-5.0 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.11 | <5.11.0-1020.21~20.04.2 | 5.11.0-1020.21~20.04.2 |
ubuntu/linux-aws-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.4 | <5.4.0-1058.61~18.04.3 | 5.4.0-1058.61~18.04.3 |
ubuntu/linux-aws-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-5.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-fips | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-hwe | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-aws-hwe | <4.15.0-1112.119~16.04.1 | 4.15.0-1112.119~16.04.1 |
ubuntu/linux-azure | <5.4.0-1062.65 | 5.4.0-1062.65 |
ubuntu/linux-azure | <5.11.0-1020.21 | 5.11.0-1020.21 |
ubuntu/linux-azure | <4.15.0-1124.137~14.04.1 | 4.15.0-1124.137~14.04.1 |
ubuntu/linux-azure | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure | <4.15.0-1124.137~16.04.1 | 4.15.0-1124.137~16.04.1 |
ubuntu/linux-azure-4.15 | <4.15.0-1124.137 | 4.15.0-1124.137 |
ubuntu/linux-azure-4.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-5.11 | <5.11.0-1020.21~20.04.1 | 5.11.0-1020.21~20.04.1 |
ubuntu/linux-azure-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-5.4 | <5.4.0-1062.65~18.04.1 | 5.4.0-1062.65~18.04.1 |
ubuntu/linux-azure-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-edge | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-fde | <5.4.0-1062.65 | 5.4.0-1062.65 |
ubuntu/linux-azure-fde | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-fde-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-azure-fips | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-bluefield | <5.4.0-1020.23 | 5.4.0-1020.23 |
ubuntu/linux-bluefield | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-dell300x | <4.15.0-1028.33 | 4.15.0-1028.33 |
ubuntu/linux-dell300x | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-fips | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp | <5.4.0-1056.60 | 5.4.0-1056.60 |
ubuntu/linux-gcp | <5.11.0-1021.23 | 5.11.0-1021.23 |
ubuntu/linux-gcp | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp | <4.15.0-1109.123~16.04.1 | 4.15.0-1109.123~16.04.1 |
ubuntu/linux-gcp-4.15 | <4.15.0-1109.123 | 4.15.0-1109.123 |
ubuntu/linux-gcp-4.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-5.11 | <5.11.0-1021.23~20.04.1 | 5.11.0-1021.23~20.04.1 |
ubuntu/linux-gcp-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-5.4 | <5.4.0-1056.60~18.04.1 | 5.4.0-1056.60~18.04.1 |
ubuntu/linux-gcp-5.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-edge | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gcp-fips | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke | <5.4.0-1054.57 | 5.4.0-1054.57 |
ubuntu/linux-gke | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke-4.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke-5.0 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gke-5.4 | <5.4.0-1054.57~18.04.1 | 5.4.0-1054.57~18.04.1 |
ubuntu/linux-gke-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gkeop | <5.4.0-1025.26 | 5.4.0-1025.26 |
ubuntu/linux-gkeop | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gkeop-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-gkeop-5.4 | <5.4.0-1025.26~18.04.1 | 5.4.0-1025.26~18.04.1 |
ubuntu/linux-gkeop-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe | <4.15.0-159.167~16.04.1 | 4.15.0-159.167~16.04.1 |
ubuntu/linux-hwe-5.11 | <5.11.0-38.42~20.04.1 | 5.11.0-38.42~20.04.1 |
ubuntu/linux-hwe-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-5.4 | <5.4.0-89.100~18.04.1 | 5.4.0-89.100~18.04.1 |
ubuntu/linux-hwe-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-5.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-hwe-edge | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-ibm | <5.4.0-1006.7 | 5.4.0-1006.7 |
ubuntu/linux-ibm | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-ibm-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-ibm-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-intel | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-intel-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-intel-iot-realtime | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-intel-iotg | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-intel-iotg-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-iot | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-kvm | <4.15.0-1100.102 | 4.15.0-1100.102 |
ubuntu/linux-kvm | <5.4.0-1048.50 | 5.4.0-1048.50 |
ubuntu/linux-kvm | <5.11.0-1018.19 | 5.11.0-1018.19 |
ubuntu/linux-kvm | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-kvm | <4.4.0-1118.128 | 4.4.0-1118.128 |
ubuntu/linux-laptop | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lowlatency | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lowlatency-hwe-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lowlatency-hwe-5.19 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lowlatency-hwe-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lowlatency-hwe-6.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-lts-xenial | <4.4.0-239.273~14.04.1 | 4.4.0-239.273~14.04.1 |
ubuntu/linux-lts-xenial | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-nvidia | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-nvidia-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-nvidia-6.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-nvidia-lowlatency | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-5.10 | <5.10.0-1050.52 | 5.10.0-1050.52 |
ubuntu/linux-oem-5.10 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-5.13 | <5.13.0-1014.18 | 5.13.0-1014.18 |
ubuntu/linux-oem-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-5.17 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-5.6 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-6.0 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-6.1 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-6.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oem-osp1 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle | <4.15.0-1081.89 | 4.15.0-1081.89 |
ubuntu/linux-oracle | <5.4.0-1056.60 | 5.4.0-1056.60 |
ubuntu/linux-oracle | <5.11.0-1020.21 | 5.11.0-1020.21 |
ubuntu/linux-oracle | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle | <4.15.0-1081.89~16.04.1 | 4.15.0-1081.89~16.04.1 |
ubuntu/linux-oracle-5.0 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle-5.11 | <5.11.0-1020.21~20.04.1 | 5.11.0-1020.21~20.04.1 |
ubuntu/linux-oracle-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle-5.13 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-oracle-5.4 | <5.4.0-1056.60~18.04.1 | 5.4.0-1056.60~18.04.1 |
ubuntu/linux-oracle-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-raspi | <5.4.0-1045.49 | 5.4.0-1045.49 |
ubuntu/linux-raspi | <5.11.0-1021.22 | 5.11.0-1021.22 |
ubuntu/linux-raspi | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-raspi-5.4 | <5.4.0-1045.49~18.04.1 | 5.4.0-1045.49~18.04.1 |
ubuntu/linux-raspi-5.4 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-raspi-realtime | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-raspi2 | <4.15.0-1096.102 | 4.15.0-1096.102 |
ubuntu/linux-raspi2 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-raspi2-5.3 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-realtime | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv | <5.11.0-1021.22 | 5.11.0-1021.22 |
ubuntu/linux-riscv | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv-5.11 | <5.11.0-1021.22~20.04.1 | 5.11.0-1021.22~20.04.1 |
ubuntu/linux-riscv-5.11 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv-5.15 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv-5.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-riscv-6.8 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-snapdragon | <4.15.0-1113.122 | 4.15.0-1113.122 |
ubuntu/linux-snapdragon | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-starfive | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-starfive-6.5 | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
ubuntu/linux-xilinx-zynqmp | <5.14~<4.4.281<5.4.141 | 5.14~ 4.4.281 5.4.141 |
debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.6-1 6.10.7-1 |
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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(Appears in the following advisories)