The GRUB2s shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Grub2 | Gnu | 2.00 (including) | 2.06-3 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | grub2-1:2.02-123.el8_6.8 | * |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | RedHat | grub2-1:2.02-87.el8_1.10 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | grub2-1:2.02-87.el8_2.10 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | grub2-1:2.02-99.el8_4.9 | * |
| Red Hat Enterprise Linux 9 | RedHat | grub2-1:2.06-27.el9_0.7 | * |
| Grub2 | Ubuntu | bionic | * |
| Grub2 | Ubuntu | impish | * |
| Grub2 | Ubuntu | upstream | * |
| Grub2-signed | Ubuntu | bionic | * |
| Grub2-signed | Ubuntu | esm-infra/xenial | * |
| Grub2-signed | Ubuntu | focal | * |
| Grub2-signed | Ubuntu | jammy | * |
| Grub2-signed | Ubuntu | kinetic | * |
| Grub2-signed | Ubuntu | trusty | * |
| Grub2-signed | Ubuntu | xenial | * |
| Grub2-unsigned | Ubuntu | bionic | * |
| Grub2-unsigned | Ubuntu | esm-infra/xenial | * |
| Grub2-unsigned | Ubuntu | focal | * |
| Grub2-unsigned | Ubuntu | jammy | * |
| Grub2-unsigned | Ubuntu | kinetic | * |
| Grub2-unsigned | Ubuntu | trusty | * |
| Grub2-unsigned | Ubuntu | xenial | * |