In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() installs an fd referencing a file from the lower filesystem without taking an additional reference to that file. After the btrfs ioctl completes this fd is closed, which then puts a reference to that file, leading to a refcount underflow.
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 | 5.0 (including) | 5.0 (including) |
| Linux_kernel | Linux | 5.3 (including) | 5.3 (including) |
| Linux | Ubuntu | eoan | * |
| Linux | Ubuntu | precise/esm | * |
| Linux | Ubuntu | upstream | * |
| Linux-aws | Ubuntu | eoan | * |
| Linux-aws | Ubuntu | upstream | * |
| Linux-aws-5.0 | Ubuntu | upstream | * |
| Linux-aws-5.15 | Ubuntu | upstream | * |
| Linux-aws-5.4 | Ubuntu | upstream | * |
| Linux-aws-6.8 | Ubuntu | upstream | * |
| Linux-aws-fips | Ubuntu | trusty | * |
| Linux-aws-fips | Ubuntu | upstream | * |
| Linux-aws-fips | Ubuntu | xenial | * |
| Linux-aws-hwe | Ubuntu | upstream | * |
| Linux-azure | Ubuntu | eoan | * |
| Linux-azure | Ubuntu | upstream | * |
| Linux-azure-4.15 | Ubuntu | upstream | * |
| Linux-azure-5.15 | Ubuntu | upstream | * |
| Linux-azure-5.3 | Ubuntu | upstream | * |
| Linux-azure-5.4 | Ubuntu | upstream | * |
| Linux-azure-6.8 | 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-fips | Ubuntu | trusty | * |
| Linux-azure-fips | Ubuntu | upstream | * |
| Linux-azure-fips | Ubuntu | xenial | * |
| Linux-bluefield | Ubuntu | upstream | * |
| Linux-fips | Ubuntu | upstream | * |
| Linux-gcp | Ubuntu | eoan | * |
| Linux-gcp | Ubuntu | upstream | * |
| Linux-gcp-4.15 | Ubuntu | upstream | * |
| Linux-gcp-5.15 | Ubuntu | upstream | * |
| Linux-gcp-5.3 | Ubuntu | upstream | * |
| Linux-gcp-5.4 | Ubuntu | upstream | * |
| Linux-gcp-6.8 | Ubuntu | upstream | * |
| Linux-gcp-edge | Ubuntu | bionic | * |
| Linux-gcp-edge | Ubuntu | esm-infra/bionic | * |
| Linux-gcp-edge | Ubuntu | upstream | * |
| 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 | upstream | * |
| Linux-gke-5.0 | Ubuntu | upstream | * |
| Linux-gke-5.3 | Ubuntu | upstream | * |
| Linux-gkeop | Ubuntu | focal | * |
| Linux-gkeop | Ubuntu | upstream | * |
| Linux-gkeop-5.15 | Ubuntu | focal | * |
| Linux-gkeop-5.15 | Ubuntu | upstream | * |
| Linux-hwe | Ubuntu | upstream | * |
| Linux-hwe-5.15 | Ubuntu | upstream | * |
| Linux-hwe-5.4 | Ubuntu | upstream | * |
| Linux-hwe-6.8 | 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 | upstream | * |
| Linux-ibm-5.15 | Ubuntu | upstream | * |
| Linux-ibm-5.4 | Ubuntu | upstream | * |
| Linux-intel | Ubuntu | upstream | * |
| Linux-intel-iot-realtime | Ubuntu | upstream | * |
| Linux-intel-iotg | Ubuntu | upstream | * |
| Linux-intel-iotg-5.15 | Ubuntu | upstream | * |
| Linux-iot | Ubuntu | upstream | * |
| Linux-kvm | Ubuntu | eoan | * |
| Linux-kvm | Ubuntu | upstream | * |
| Linux-lowlatency | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-5.15 | Ubuntu | upstream | * |
| Linux-lowlatency-hwe-6.8 | Ubuntu | upstream | * |
| Linux-lts-trusty | Ubuntu | precise/esm | * |
| Linux-lts-trusty | Ubuntu | upstream | * |
| Linux-lts-xenial | Ubuntu | upstream | * |
| Linux-nvidia | Ubuntu | upstream | * |
| Linux-nvidia-6.8 | Ubuntu | upstream | * |
| Linux-nvidia-lowlatency | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | xenial | * |
| Linux-oem-6.11 | Ubuntu | upstream | * |
| Linux-oem-6.8 | Ubuntu | upstream | * |
| Linux-oem-osp1 | Ubuntu | upstream | * |
| Linux-oracle | Ubuntu | eoan | * |
| Linux-oracle | Ubuntu | upstream | * |
| Linux-oracle-5.0 | Ubuntu | upstream | * |
| Linux-oracle-5.15 | Ubuntu | upstream | * |
| Linux-oracle-5.4 | Ubuntu | upstream | * |
| Linux-oracle-6.8 | Ubuntu | upstream | * |
| Linux-raspi | Ubuntu | upstream | * |
| Linux-raspi-5.4 | Ubuntu | upstream | * |
| Linux-raspi-realtime | Ubuntu | upstream | * |
| Linux-raspi2 | Ubuntu | eoan | * |
| Linux-raspi2 | Ubuntu | focal | * |
| Linux-raspi2 | Ubuntu | upstream | * |
| Linux-raspi2-5.3 | Ubuntu | upstream | * |
| Linux-realtime | Ubuntu | jammy | * |
| Linux-realtime | Ubuntu | upstream | * |
| Linux-riscv | Ubuntu | focal | * |
| Linux-riscv | Ubuntu | jammy | * |
| Linux-riscv | Ubuntu | upstream | * |
| Linux-riscv-5.15 | Ubuntu | upstream | * |
| Linux-riscv-6.8 | Ubuntu | upstream | * |
| Linux-snapdragon | Ubuntu | upstream | * |
| Linux-xilinx-zynqmp | Ubuntu | upstream | * |