CWE
200
Advisory Published
Updated

CVE-2021-3732: Infoleak

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 SoftwareAffected VersionHow 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-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-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-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-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-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-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
5.10.218-1
5.10.221-1
6.1.94-1
6.1.99-1
6.9.8-1
6.9.9-1

Remedy

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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Reference Links

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