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Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade grub | Aug 22, 2024 | Jul 29, 2020 |
| Centos_linux | — | Upgrade grub2-efi-ia32-cdbootUpgrade grub2-tools-extraUpgrade shim-unsigned-ia32Upgrade mokutil-debuginfoUpgrade grub2-efi-x64-modulesUpgrade grub2-pc-modulesUpgrade fwupdUpgrade mokutilUpgrade grub2-debuginfoUpgrade shim-x64Upgrade fwupd-debugsourceUpgrade fwupdate-libsUpgrade fwupdate-efiUpgrade grub2-ppc-modulesUpgrade fwupdate-develUpgrade grub2-tools-debuginfoUpgrade grub2-tools-extra-debuginfoUpgrade grub2-commonUpgrade grub2-efi-aa64-modulesUpgrade grub2-tools-efiUpgrade grub2-debugsourceUpgrade grub2-toolsUpgrade shim-unsigned-x64Upgrade grub2-tools-minimalUpgrade grub2Upgrade grub2-ppc64le-modulesUpgrade grub2-tools-efi-debuginfoUpgrade grub2-efi-ia32Upgrade shim-ia32Upgrade grub2-efi-x64-cdbootUpgrade grub2-efi-x64Upgrade fwupdate-debuginfoUpgrade fwupd-debuginfoUpgrade grub2-ppc64-modulesUpgrade grub2-pcUpgrade fwupdateUpgrade grub2-efi-ia32-modulesUpgrade grub2-tools-minimal-debuginfo | Jul 30, 2020 | Jul 29, 2020 |
| Debian | — | Upgrade grub2 | Jul 31, 2020 | Jul 29, 2020 |
| Gentoo Linux | — | Upgrade sys-devel/grub. | May 3, 2021 | Jul 29, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade grub2-toolsUpgrade grub2-commonUpgrade grub2-tools-minimalUpgrade grub2-efi-aa64-modulesUpgrade grub2-tools-extraUpgrade grub2-efi-aa64-cdbootUpgrade grub2-efi-aa64 | Aug 31, 2020 | Jul 29, 2020 |
| Oracle_linux | — | Upgrade grub2-efi-ia32-cdbootUpgrade grub2-efi-ia32-modulesUpgrade grub2Upgrade grub2-efi-x64-modulesUpgrade grub2-toolsUpgrade grub2-pcUpgrade grub2-efi-aa64-modulesUpgrade grub2-commonUpgrade grub2-efi-x64Upgrade grub2-tools-efiUpgrade grub2-efi-ia32Upgrade grub2-efi-aa64Upgrade grub2-efi-aa64-cdbootUpgrade grub2-tools-minimalUpgrade grub2-pc-modulesUpgrade grub2-tools-extraUpgrade grub2-efi-x64-cdboot | Jul 30, 2020 | Jul 29, 2020 |
| Redhat_linux | — | Upgrade grub2-debugsourceUpgrade fwupdate-efiUpgrade grub2-tools-debuginfoUpgrade fwupdateUpgrade shim-unsigned-x64-debuginfoUpgrade grub2-efi-ia32-modulesUpgrade grub2-ppc-modulesUpgrade grub2-tools-efiUpgrade grub2-tools-extraUpgrade grub2-efi-ia32-cdbootUpgrade grub2-tools-efi-debuginfoUpgrade grub2-efi-x64Upgrade grub2-ppc64-modulesUpgrade grub2-efi-ia32Upgrade grub2-efi-x64-modulesUpgrade grub2-tools-minimal-debuginfoUpgrade grub2Upgrade mokutilUpgrade grub2-toolsUpgrade grub2-efi-x64-cdbootUpgrade grub2-tools-minimalUpgrade shim-ia32Upgrade shim-x64Upgrade grub2-debuginfoUpgrade grub2-commonUpgrade shim-unsigned-aa64-debuginfoUpgrade fwupdate-debuginfoUpgrade fwupd-debuginfoUpgrade grub2-efi-aa64-modulesUpgrade shim-unsigned-ia32-debuginfoUpgrade shim-unsigned-x64Upgrade fwupdate-libsUpgrade grub2-ppc64le-modulesUpgrade fwupd-debugsourceUpgrade grub2-pc-modulesUpgrade grub2-tools-extra-debuginfoUpgrade mokutil-debuginfoUpgrade fwupdUpgrade shim-unsigned-ia32Upgrade fwupdate-develUpgrade grub2-pc | Jul 30, 2020 | Jul 29, 2020 |
| Suse | — | Upgrade grub2-s390x-emuUpgrade grub2-i386-pcUpgrade grub2-i386-efiUpgrade grub2-x86_64-efiUpgrade grub2-powerpc-ieee1275Upgrade grub2-arm64-efiUpgrade grub2-systemd-sleep-pluginUpgrade grub2-i386-efi-debugUpgrade grub2-x86_64-efi-debugUpgrade grub2-i386-xenUpgrade grub2-x86_64-xenUpgrade grub2Upgrade grub2-i386-pc-debugUpgrade grub2-branding-upstreamUpgrade grub2-snapper-plugin | Jul 30, 2020 | Jul 29, 2020 |
| Ubuntu | — | Upgrade grub-efi-amd64-signedUpgrade grub-efi-arm64-binUpgrade grub-efi-amd64-binUpgrade grub-efi-arm-binUpgrade grub-efi-arm64-signedUpgrade grub-efi-ia32-bin | Aug 5, 2020 | Jul 29, 2020 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jul 29, 2020 |
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