An issue was discovered in the Linux kernel before 5.0.4. There is a use-after-free upon attempted read access to /proc/ioports after the ipmi_si module is removed, related to drivers/char/ipmi/ipmi_si_intf.c, drivers/char/ipmi/ipmi_si_mem_io.c, and drivers/char/ipmi/ipmi_si_port_io.c.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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 |
|---|---|---|---|
| Linux_kernel | Linux | 4.18 (including) | 4.19.31 (excluding) |
| Linux_kernel | Linux | 4.20 (including) | 5.0.4 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | kernel-rt-0:3.10.0-957.27.2.rt56.940.el7 | * |
| Red Hat Enterprise Linux 7 | RedHat | kernel-0:3.10.0-957.27.2.el7 | * |
| Red Hat Enterprise Linux 7 | RedHat | kernel-alt-0:4.14.0-115.26.1.el7a | * |
| Red Hat Enterprise Linux 7.4 Advanced Update Support | RedHat | kernel-0:3.10.0-693.61.1.el7 | * |
| Red Hat Enterprise Linux 7.4 Telco Extended Update Support | RedHat | kernel-0:3.10.0-693.61.1.el7 | * |
| Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions | RedHat | kernel-0:3.10.0-693.61.1.el7 | * |
| Red Hat Enterprise Linux 7.5 Extended Update Support | RedHat | kernel-0:3.10.0-862.46.1.el7 | * |
| Red Hat Enterprise Linux 8 | RedHat | kernel-rt-0:4.18.0-80.7.1.rt9.153.el8_0 | * |
| Red Hat Enterprise Linux 8 | RedHat | kernel-0:4.18.0-80.7.1.el8_0 | * |
| Red Hat Enterprise MRG 2 | RedHat | kernel-rt-1:3.10.0-693.61.1.rt56.656.el6rt | * |
| Linux | Ubuntu | cosmic | * |
| Linux | Ubuntu | esm-infra-legacy/trusty | * |
| Linux | Ubuntu | precise/esm | * |
| Linux | Ubuntu | trusty/esm | * |
| Linux | Ubuntu | upstream | * |
| Linux-aws | Ubuntu | cosmic | * |
| Linux-aws | Ubuntu | upstream | * |
| Linux-aws-hwe | Ubuntu | upstream | * |
| Linux-azure | Ubuntu | cosmic | * |
| Linux-azure | Ubuntu | esm-infra-legacy/trusty | * |
| Linux-azure | Ubuntu | trusty/esm | * |
| Linux-azure | Ubuntu | upstream | * |
| Linux-azure-edge | Ubuntu | upstream | * |
| Linux-euclid | Ubuntu | upstream | * |
| Linux-euclid | Ubuntu | xenial | * |
| Linux-flo | Ubuntu | upstream | * |
| Linux-flo | Ubuntu | xenial | * |
| Linux-gcp | Ubuntu | cosmic | * |
| Linux-gcp | Ubuntu | upstream | * |
| Linux-gcp-edge | Ubuntu | upstream | * |
| Linux-gke | Ubuntu | upstream | * |
| Linux-gke | Ubuntu | xenial | * |
| Linux-gke-4.15 | Ubuntu | upstream | * |
| Linux-gke-5.0 | Ubuntu | upstream | * |
| Linux-goldfish | Ubuntu | upstream | * |
| Linux-goldfish | Ubuntu | xenial | * |
| Linux-grouper | Ubuntu | upstream | * |
| Linux-hwe | Ubuntu | bionic | * |
| Linux-hwe | Ubuntu | esm-infra/bionic | * |
| Linux-hwe | Ubuntu | upstream | * |
| Linux-hwe-edge | Ubuntu | upstream | * |
| Linux-kvm | Ubuntu | cosmic | * |
| Linux-kvm | Ubuntu | upstream | * |
| Linux-lts-trusty | Ubuntu | precise/esm | * |
| Linux-lts-trusty | Ubuntu | upstream | * |
| Linux-lts-utopic | Ubuntu | upstream | * |
| Linux-lts-vivid | Ubuntu | upstream | * |
| Linux-lts-wily | Ubuntu | upstream | * |
| Linux-lts-xenial | Ubuntu | esm-infra-legacy/trusty | * |
| Linux-lts-xenial | Ubuntu | trusty/esm | * |
| Linux-lts-xenial | Ubuntu | upstream | * |
| Linux-maguro | Ubuntu | upstream | * |
| Linux-mako | Ubuntu | upstream | * |
| Linux-mako | Ubuntu | xenial | * |
| Linux-manta | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | upstream | * |
| Linux-oem | Ubuntu | xenial | * |
| Linux-oracle | Ubuntu | upstream | * |
| Linux-raspi2 | Ubuntu | cosmic | * |
| Linux-raspi2 | Ubuntu | upstream | * |
| Linux-snapdragon | Ubuntu | upstream | * |