In bdi_put and bdi_unregister of backing-dev.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-182815710References: Upstream kernel
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Android | - (including) | - (including) | |
| Linux | Ubuntu | trusty | * |
| Linux | Ubuntu | xenial | * |
| Linux-aws | Ubuntu | trusty | * |
| Linux-aws | Ubuntu | xenial | * |
| Linux-aws-5.0 | Ubuntu | bionic | * |
| Linux-aws-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-aws-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-aws-5.11 | Ubuntu | focal | * |
| Linux-aws-5.11 | Ubuntu | upstream | * |
| Linux-aws-5.13 | Ubuntu | esm-infra/focal | * |
| Linux-aws-5.13 | Ubuntu | focal | * |
| Linux-aws-5.13 | Ubuntu | upstream | * |
| Linux-aws-5.3 | Ubuntu | bionic | * |
| Linux-aws-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-aws-5.3 | Ubuntu | upstream | * |
| Linux-aws-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-aws-5.8 | Ubuntu | focal | * |
| Linux-aws-5.8 | Ubuntu | upstream | * |
| Linux-aws-hwe | Ubuntu | xenial | * |
| Linux-azure | Ubuntu | bionic | * |
| Linux-azure | Ubuntu | esm-infra/bionic | * |
| Linux-azure | Ubuntu | trusty | * |
| Linux-azure | Ubuntu | xenial | * |
| Linux-azure-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-azure-5.11 | Ubuntu | focal | * |
| Linux-azure-5.11 | Ubuntu | upstream | * |
| Linux-azure-5.13 | Ubuntu | esm-infra/focal | * |
| Linux-azure-5.13 | Ubuntu | focal | * |
| Linux-azure-5.13 | Ubuntu | upstream | * |
| Linux-azure-5.3 | Ubuntu | bionic | * |
| Linux-azure-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-azure-5.3 | Ubuntu | upstream | * |
| Linux-azure-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-azure-5.8 | Ubuntu | focal | * |
| Linux-azure-5.8 | Ubuntu | upstream | * |
| Linux-azure-edge | Ubuntu | bionic | * |
| Linux-azure-edge | Ubuntu | esm-infra/bionic | * |
| Linux-gcp | Ubuntu | bionic | * |
| Linux-gcp | Ubuntu | esm-infra/bionic | * |
| Linux-gcp | Ubuntu | xenial | * |
| Linux-gcp-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-gcp-5.11 | Ubuntu | focal | * |
| Linux-gcp-5.11 | Ubuntu | upstream | * |
| Linux-gcp-5.13 | Ubuntu | esm-infra/focal | * |
| Linux-gcp-5.13 | Ubuntu | focal | * |
| Linux-gcp-5.13 | Ubuntu | upstream | * |
| Linux-gcp-5.3 | Ubuntu | bionic | * |
| Linux-gcp-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-gcp-5.3 | Ubuntu | upstream | * |
| Linux-gcp-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-gcp-5.8 | Ubuntu | focal | * |
| Linux-gcp-5.8 | Ubuntu | upstream | * |
| Linux-gke | Ubuntu | xenial | * |
| Linux-gke-5.0 | Ubuntu | bionic | * |
| Linux-gke-5.3 | Ubuntu | bionic | * |
| Linux-gke-5.3 | Ubuntu | upstream | * |
| Linux-hwe | Ubuntu | bionic | * |
| Linux-hwe | Ubuntu | esm-infra/bionic | * |
| Linux-hwe | Ubuntu | xenial | * |
| Linux-hwe-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-hwe-5.11 | Ubuntu | focal | * |
| Linux-hwe-5.11 | Ubuntu | upstream | * |
| Linux-hwe-5.13 | Ubuntu | esm-infra/focal | * |
| Linux-hwe-5.13 | Ubuntu | focal | * |
| Linux-hwe-5.13 | Ubuntu | upstream | * |
| Linux-hwe-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-hwe-5.8 | Ubuntu | focal | * |
| Linux-hwe-5.8 | 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 | xenial | * |
| Linux-kvm | Ubuntu | xenial | * |
| Linux-lts-xenial | Ubuntu | trusty | * |
| Linux-oem | Ubuntu | xenial | * |
| Linux-oem-5.13 | Ubuntu | esm-infra/focal | * |
| Linux-oem-5.13 | Ubuntu | focal | * |
| Linux-oem-5.13 | Ubuntu | upstream | * |
| Linux-oracle | Ubuntu | xenial | * |
| Linux-oracle-5.0 | Ubuntu | bionic | * |
| Linux-oracle-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-oracle-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-oracle-5.11 | Ubuntu | focal | * |
| Linux-oracle-5.11 | Ubuntu | upstream | * |
| Linux-oracle-5.3 | Ubuntu | bionic | * |
| Linux-oracle-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-oracle-5.3 | Ubuntu | upstream | * |
| Linux-oracle-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-oracle-5.8 | Ubuntu | focal | * |
| Linux-oracle-5.8 | Ubuntu | upstream | * |
| Linux-raspi2 | Ubuntu | esm-infra/focal | * |
| Linux-raspi2 | Ubuntu | focal | * |
| Linux-raspi2 | Ubuntu | xenial | * |
| Linux-raspi2-5.3 | Ubuntu | bionic | * |
| Linux-raspi2-5.3 | Ubuntu | upstream | * |
| Linux-riscv | Ubuntu | esm-infra/focal | * |
| Linux-riscv | Ubuntu | focal | * |
| Linux-riscv-5.11 | Ubuntu | esm-infra/focal | * |
| Linux-riscv-5.11 | Ubuntu | focal | * |
| Linux-riscv-5.11 | Ubuntu | upstream | * |
| Linux-riscv-5.8 | Ubuntu | esm-infra/focal | * |
| Linux-riscv-5.8 | Ubuntu | focal | * |
| Linux-riscv-5.8 | Ubuntu | upstream | * |
| Linux-snapdragon | Ubuntu | xenial | * |