A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 5.1 (including) | 5.4.173 (excluding) |
| Linux_kernel | Linux | 5.5 (including) | 5.10.93 (excluding) |
| Linux_kernel | Linux | 5.11 (including) | 5.15.16 (excluding) |
| Linux_kernel | Linux | 5.16 (including) | 5.16.2 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | kernel-rt-0:4.18.0-348.12.2.rt7.143.el8_5 | * |
| Red Hat Enterprise Linux 8 | RedHat | kernel-0:4.18.0-348.12.2.el8_5 | * |
| Red Hat Enterprise Linux 8 | RedHat | kpatch-patch | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | kernel-rt-0:4.18.0-305.34.2.rt7.107.el8_4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | kernel-0:4.18.0-305.34.2.el8_4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | kpatch-patch | * |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | RedHat | redhat-virtualization-host-0:4.4.10-202202081536_8.5 | * |
| Linux | Ubuntu | focal | * |
| Linux | Ubuntu | hirsute | * |
| Linux | Ubuntu | impish | * |
| Linux | Ubuntu | upstream | * |
| Linux-allwinner | Ubuntu | upstream | * |
| Linux-allwinner-5.19 | Ubuntu | upstream | * |
| Linux-aws | Ubuntu | focal | * |
| Linux-aws | Ubuntu | hirsute | * |
| Linux-aws | Ubuntu | impish | * |
| Linux-aws | Ubuntu | trusty | * |
| Linux-aws | Ubuntu | upstream | * |
| Linux-aws | Ubuntu | xenial | * |
| Linux-aws-5.0 | Ubuntu | bionic | * |
| Linux-aws-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-aws-5.0 | Ubuntu | upstream | * |
| Linux-aws-5.11 | Ubuntu | focal | * |
| Linux-aws-5.11 | Ubuntu | upstream | * |
| Linux-aws-5.13 | Ubuntu | focal | * |
| Linux-aws-5.13 | Ubuntu | upstream | * |
| Linux-aws-5.15 | Ubuntu | upstream | * |
| Linux-aws-5.19 | Ubuntu | upstream | * |
| Linux-aws-5.3 | Ubuntu | bionic | * |
| Linux-aws-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-aws-5.3 | Ubuntu | upstream | * |
| Linux-aws-5.4 | Ubuntu | bionic | * |
| Linux-aws-5.4 | Ubuntu | upstream | * |
| Linux-aws-5.8 | Ubuntu | focal | * |
| Linux-aws-5.8 | Ubuntu | upstream | * |
| Linux-aws-6.2 | Ubuntu | upstream | * |
| Linux-aws-6.5 | Ubuntu | upstream | * |
| Linux-aws-fips | Ubuntu | fips/focal | * |
| Linux-aws-fips | Ubuntu | trusty | * |
| Linux-aws-fips | Ubuntu | upstream | * |
| Linux-aws-fips | Ubuntu | xenial | * |
| Linux-aws-hwe | Ubuntu | upstream | * |
| Linux-aws-hwe | Ubuntu | xenial | * |
| Linux-azure | Ubuntu | bionic | * |
| Linux-azure | Ubuntu | esm-infra/bionic | * |
| Linux-azure | Ubuntu | focal | * |
| Linux-azure | Ubuntu | hirsute | * |
| Linux-azure | Ubuntu | impish | * |
| Linux-azure | Ubuntu | trusty | * |
| Linux-azure | Ubuntu | upstream | * |
| Linux-azure | Ubuntu | xenial | * |
| Linux-azure-4.15 | Ubuntu | upstream | * |
| Linux-azure-5.11 | Ubuntu | focal | * |
| Linux-azure-5.11 | Ubuntu | upstream | * |
| Linux-azure-5.13 | Ubuntu | focal | * |
| Linux-azure-5.13 | Ubuntu | upstream | * |
| Linux-azure-5.15 | Ubuntu | upstream | * |
| Linux-azure-5.19 | Ubuntu | upstream | * |
| Linux-azure-5.3 | Ubuntu | bionic | * |
| Linux-azure-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-azure-5.3 | Ubuntu | upstream | * |
| Linux-azure-5.4 | Ubuntu | bionic | * |
| Linux-azure-5.4 | Ubuntu | upstream | * |
| Linux-azure-5.8 | Ubuntu | focal | * |
| Linux-azure-5.8 | Ubuntu | upstream | * |
| Linux-azure-6.2 | Ubuntu | upstream | * |
| Linux-azure-6.5 | Ubuntu | upstream | * |
| Linux-azure-edge | Ubuntu | bionic | * |
| Linux-azure-edge | Ubuntu | esm-infra/bionic | * |
| Linux-azure-edge | Ubuntu | upstream | * |
| Linux-azure-fde | Ubuntu | focal | * |
| Linux-azure-fde | Ubuntu | upstream | * |
| Linux-azure-fde-5.15 | Ubuntu | upstream | * |
| Linux-azure-fde-5.19 | Ubuntu | upstream | * |
| Linux-azure-fde-6.2 | Ubuntu | upstream | * |
| Linux-azure-fips | Ubuntu | fips/focal | * |
| Linux-azure-fips | Ubuntu | trusty | * |
| Linux-azure-fips | Ubuntu | upstream | * |
| Linux-azure-fips | Ubuntu | xenial | * |
| Linux-bluefield | Ubuntu | focal | * |
| Linux-bluefield | Ubuntu | upstream | * |
| Linux-dell300x | Ubuntu | upstream | * |
| Linux-fips | Ubuntu | fips/focal | * |
| Linux-fips | Ubuntu | trusty | * |
| Linux-fips | Ubuntu | upstream | * |
| Linux-fips | Ubuntu | xenial | * |
| Linux-gcp | Ubuntu | bionic | * |
| Linux-gcp | Ubuntu | esm-infra/bionic | * |
| Linux-gcp | Ubuntu | focal | * |
| Linux-gcp | Ubuntu | hirsute | * |
| Linux-gcp | Ubuntu | impish | * |
| Linux-gcp | Ubuntu | upstream | * |
| Linux-gcp | Ubuntu | xenial | * |
| Linux-gcp-4.15 | Ubuntu | upstream | * |
| Linux-gcp-5.11 | Ubuntu | focal | * |
| Linux-gcp-5.11 | Ubuntu | upstream | * |
| Linux-gcp-5.13 | Ubuntu | focal | * |
| Linux-gcp-5.13 | Ubuntu | upstream | * |
| Linux-gcp-5.15 | Ubuntu | upstream | * |
| Linux-gcp-5.19 | Ubuntu | upstream | * |
| Linux-gcp-5.3 | Ubuntu | bionic | * |
| Linux-gcp-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-gcp-5.3 | Ubuntu | upstream | * |
| Linux-gcp-5.4 | Ubuntu | bionic | * |
| Linux-gcp-5.4 | Ubuntu | upstream | * |
| Linux-gcp-5.8 | Ubuntu | focal | * |
| Linux-gcp-5.8 | Ubuntu | upstream | * |
| Linux-gcp-6.2 | Ubuntu | upstream | * |
| Linux-gcp-6.5 | Ubuntu | upstream | * |
| Linux-gcp-fips | Ubuntu | fips/focal | * |
| Linux-gcp-fips | Ubuntu | trusty | * |
| Linux-gcp-fips | Ubuntu | upstream | * |
| Linux-gcp-fips | Ubuntu | xenial | * |
| Linux-gke | Ubuntu | focal | * |
| Linux-gke | Ubuntu | upstream | * |
| Linux-gke | Ubuntu | xenial | * |
| Linux-gke-4.15 | Ubuntu | bionic | * |
| Linux-gke-4.15 | Ubuntu | esm-infra/bionic | * |
| Linux-gke-4.15 | Ubuntu | upstream | * |
| Linux-gke-5.0 | Ubuntu | bionic | * |
| Linux-gke-5.0 | Ubuntu | upstream | * |
| Linux-gke-5.15 | Ubuntu | upstream | * |
| Linux-gke-5.3 | Ubuntu | bionic | * |
| Linux-gke-5.3 | Ubuntu | upstream | * |
| Linux-gke-5.4 | Ubuntu | bionic | * |
| Linux-gke-5.4 | Ubuntu | upstream | * |
| Linux-gkeop | Ubuntu | focal | * |
| Linux-gkeop | Ubuntu | upstream | * |
| Linux-gkeop-5.15 | Ubuntu | upstream | * |
| Linux-gkeop-5.4 | Ubuntu | bionic | * |
| Linux-gkeop-5.4 | Ubuntu | upstream | * |
| Linux-hwe | Ubuntu | bionic | * |
| Linux-hwe | Ubuntu | esm-infra/bionic | * |
| Linux-hwe | Ubuntu | upstream | * |
| Linux-hwe | Ubuntu | xenial | * |
| Linux-hwe-5.11 | Ubuntu | focal | * |
| Linux-hwe-5.11 | Ubuntu | upstream | * |
| Linux-hwe-5.13 | Ubuntu | focal | * |
| Linux-hwe-5.13 | Ubuntu | upstream | * |
| Linux-hwe-5.15 | Ubuntu | upstream | * |
| Linux-hwe-5.19 | Ubuntu | upstream | * |
| Linux-hwe-5.4 | Ubuntu | bionic | * |
| Linux-hwe-5.4 | Ubuntu | upstream | * |
| Linux-hwe-5.8 | Ubuntu | focal | * |
| Linux-hwe-5.8 | Ubuntu | upstream | * |
| Linux-hwe-6.2 | Ubuntu | upstream | * |
| Linux-hwe-6.5 | Ubuntu | upstream | * |
| Linux-hwe-edge | Ubuntu | bionic | * |
| Linux-hwe-edge | Ubuntu | esm-infra/bionic | * |
| Linux-hwe-edge | Ubuntu | esm-infra/xenial | * |
| Linux-hwe-edge | Ubuntu | upstream | * |
| Linux-hwe-edge | Ubuntu | xenial | * |
| Linux-ibm | Ubuntu | focal | * |
| Linux-ibm | Ubuntu | upstream | * |
| Linux-ibm-5.15 | Ubuntu | upstream | * |
| Linux-ibm-5.4 | Ubuntu | bionic | * |
| Linux-ibm-5.4 | Ubuntu | upstream | * |
| Linux-intel | Ubuntu | upstream | * |
| Linux-intel-5.13 | Ubuntu | focal | * |
| Linux-intel-5.13 | Ubuntu | upstream | * |
| Linux-intel-iotg | Ubuntu | upstream | * |
| Linux-intel-iotg-5.15 | Ubuntu | upstream | * |
| Linux-iot | Ubuntu | upstream | * |
| Linux-kvm | Ubuntu | focal | * |
| Linux-kvm | Ubuntu | hirsute | * |
| Linux-kvm | Ubuntu | impish | * |
| Linux-kvm | Ubuntu | upstream | * |
| Linux-kvm | Ubuntu | xenial | * |
| Linux-laptop | Ubuntu | upstream | * |
| Linux-lowlatency | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-5.15 | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-5.19 | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-6.2 | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-6.5 | Ubuntu | upstream | * |
| Linux-lts-xenial | Ubuntu | trusty | * |
| Linux-lts-xenial | Ubuntu | upstream | * |
| Linux-nvidia | Ubuntu | upstream | * |
| Linux-nvidia-6.2 | Ubuntu | upstream | * |
| Linux-nvidia-6.5 | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | bionic | * |
| Linux-oem | Ubuntu | esm-infra/bionic | * |
| Linux-oem | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | xenial | * |
| Linux-oem-5.10 | Ubuntu | focal | * |
| Linux-oem-5.10 | Ubuntu | upstream | * |
| Linux-oem-5.13 | Ubuntu | focal | * |
| Linux-oem-5.13 | Ubuntu | upstream | * |
| Linux-oem-5.14 | Ubuntu | focal | * |
| Linux-oem-5.14 | Ubuntu | upstream | * |
| Linux-oem-5.17 | Ubuntu | upstream | * |
| Linux-oem-5.6 | Ubuntu | focal | * |
| Linux-oem-5.6 | Ubuntu | upstream | * |
| Linux-oem-6.0 | Ubuntu | upstream | * |
| Linux-oem-6.1 | Ubuntu | upstream | * |
| Linux-oem-6.5 | Ubuntu | upstream | * |
| Linux-oem-6.8 | Ubuntu | upstream | * |
| Linux-oem-osp1 | Ubuntu | bionic | * |
| Linux-oem-osp1 | Ubuntu | upstream | * |
| Linux-oracle | Ubuntu | focal | * |
| Linux-oracle | Ubuntu | hirsute | * |
| Linux-oracle | Ubuntu | impish | * |
| Linux-oracle | Ubuntu | upstream | * |
| Linux-oracle | Ubuntu | xenial | * |
| Linux-oracle-5.0 | Ubuntu | bionic | * |
| Linux-oracle-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-oracle-5.0 | Ubuntu | upstream | * |
| Linux-oracle-5.11 | Ubuntu | focal | * |
| Linux-oracle-5.11 | Ubuntu | upstream | * |
| Linux-oracle-5.13 | Ubuntu | focal | * |
| Linux-oracle-5.13 | Ubuntu | upstream | * |
| Linux-oracle-5.15 | Ubuntu | upstream | * |
| Linux-oracle-5.3 | Ubuntu | bionic | * |
| Linux-oracle-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-oracle-5.3 | Ubuntu | upstream | * |
| Linux-oracle-5.4 | Ubuntu | bionic | * |
| Linux-oracle-5.4 | Ubuntu | upstream | * |
| Linux-oracle-5.8 | Ubuntu | focal | * |
| Linux-oracle-5.8 | Ubuntu | upstream | * |
| Linux-oracle-6.5 | Ubuntu | upstream | * |
| Linux-raspi | Ubuntu | focal | * |
| Linux-raspi | Ubuntu | hirsute | * |
| Linux-raspi | Ubuntu | impish | * |
| Linux-raspi | Ubuntu | upstream | * |
| Linux-raspi-5.4 | Ubuntu | bionic | * |
| Linux-raspi-5.4 | Ubuntu | upstream | * |
| Linux-raspi2 | Ubuntu | focal | * |
| Linux-raspi2 | Ubuntu | upstream | * |
| Linux-raspi2 | Ubuntu | xenial | * |
| Linux-raspi2-5.3 | Ubuntu | bionic | * |
| Linux-raspi2-5.3 | Ubuntu | upstream | * |
| Linux-riscv | Ubuntu | focal | * |
| Linux-riscv | Ubuntu | hirsute | * |
| Linux-riscv | Ubuntu | impish | * |
| Linux-riscv | Ubuntu | upstream | * |
| Linux-riscv-5.11 | Ubuntu | focal | * |
| Linux-riscv-5.11 | Ubuntu | upstream | * |
| Linux-riscv-5.15 | Ubuntu | upstream | * |
| Linux-riscv-5.19 | Ubuntu | upstream | * |
| Linux-riscv-5.8 | Ubuntu | focal | * |
| Linux-riscv-5.8 | Ubuntu | upstream | * |
| Linux-riscv-6.5 | Ubuntu | upstream | * |
| Linux-snapdragon | Ubuntu | upstream | * |
| Linux-snapdragon | Ubuntu | xenial | * |
| Linux-starfive | Ubuntu | upstream | * |
| Linux-starfive-5.19 | Ubuntu | upstream | * |
| Linux-starfive-6.2 | Ubuntu | upstream | * |
| Linux-starfive-6.5 | Ubuntu | upstream | * |
| Linux-xilinx-zynqmp | Ubuntu | upstream | * |