shim-review

This repo is for review of requests for signing shim. To create a request for review: clone this repo preferably fork it edit the template below add the shim.efi to be signed add build logs add any additional binaries/certificates/SHA256 hashes that may be needed commit all of that tag it with a...

CVE-2020-14372

CVE-2020-14372: Bypassing not so Secure Boot with one "simple trick" Vulnerability details One day I typed "help" into GRUB2's console and saw some really "fun" commands: readbyte ADDR: Read 8-bit value from ADDR writebyte ADDR VAL: Write 8-bit value VAL to ADDR I immediately thought I found the...

CVE-2026-97876

A flaw was found in GRUB2. The bootloader insufficiently validates memory addresses passed to the serial configuration command, allowing arbitrary system memory to be targeted instead of a legitimate serial communication device. A local attacker with control over GRUB's boot configuration can...

shim

shim, a first-stage UEFI bootloader shim is a trivial EFI application that, when run, attempts to open and execute another application. It will initially attempt to do this via the standard EFI LoadImage and StartImage calls. If these fail because Secure Boot is enabled and the binary is not sign...

CVE-2025-0690

CVE-2025-0690: Vulnerabilidad de Desbordamiento de Enteros en GRUB2 🛡️ Descripción General CVE-2025-0690 es una vulnerabilidad crítica de desbordamiento de enteros en el cargador de arranque GRUB2 , que permite la ejecución de código arbitrario y la evasión de Secure Boot. Esta falla afecta a...

Rocky Linux 8 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-debugsource / grub2-efi-aa64 / etc (crlsa-2022_2110)

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20222110 advisory. grub2: Incorrect permission in grub.cfg allow unprivileged user to read the file content CVE-2021-3981 Tenable has extracted the preceding description block directl...

Rocky Linux 9 [CIQ] Security Update: grub2-common / grub2-efi-aa64 / grub2-efi-aa64-cdboot / etc Multiple Vulnerabilities (crlsa-2023_0752)

The Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20230752 advisory. grub2: Buffer overflow in grubfontconstructglyph can lead to out-of-bound write and possible secure boot bypass CVE-2022-2601 grub2: Heap based out-of-boun...

Rocky Linux 8 [CIQ] Security Update: fwupd / fwupd-debuginfo / fwupd-debugsource Multiple Vulnerabilities (crlsa-2021_2566)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20212566 advisory. grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 grub2: Use-after-free in rmmod command...

Rocky Linux 9 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-debugsource / grub2-efi-aa64 / etc (crlsa-2025_20532)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-202520532 advisory. grub2: grub-core/gettext: Integer overflow leads to Heap OOB Write. CVE-2024-45777 Tenable has extracted the preceding description block directly from the CIQ...

Rocky Linux 8.6 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-aa64 / etc Multiple Vulnerabilities (ciqsa-2026_0881)

The Rocky Linux 8.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20260881 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 8.6. It addresses 2 CVEs: CVE-2022-2601, CVE-2022-3775. Tenable has extracted the...

Rocky Linux 9.2 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-aa64 / etc Multiple Vulnerabilities (ciqsa-2026_0426)

The Rocky Linux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20260426 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 9.2. It addresses 13 CVEs: CVE-2024-45781, CVE-2025-0622, CVE-2024-45783,...

CentOS Linux 8.5 [TuxCare] Security Update: grub2-common / grub2-efi-ia32 / grub2-efi-ia32-cdboot / etc (CENTOS8.5:CLSA-2026:1771955086)

The CentOS Linux 8.5 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS8.5:CLSA-2026:1771955086 advisory. - A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext...

Rocky Linux 8.8 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-aa64 / etc Multiple Vulnerabilities (ciqsa-2026_0378)

The Rocky Linux 8.8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20260378 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 8.8. It addresses 4 CVEs: CVE-2025-0624, CVE-2024-1048, CVE-2023-4693, CVE-2023-469...

AlmaLinux 9.2 [TuxCare] Security Update: grub2-common / grub2-efi-aa64-modules / grub2-efi-x64 / etc (ALMALINUX9.2:CLSA-2026:1771409383)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1771409383 advisory. - A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext...

Rocky Linux 8 [CIQ] Security Update: shim-unsigned-aarch64 Multiple Vulnerabilities (crlsa-2021_1734)

The Rocky Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CIQ crlsa-20211734 advisory. grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 grub2: Use-after-free in rmmod command...

Rocky Linux 8.6 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-aa64 / etc Multiple Vulnerabilities (ciqsa-2026_1267)

The Rocky Linux 8.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20261267 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 8.6. It addresses 3 CVEs: CVE-2024-1048, CVE-2023-4693, CVE-2023-4692. Tenable has...

CentOS Linux 8 [TuxCare] Security Update: grub2-efi-ia32-cdboot / grub2-efi-ia32-modules / grub2-efi-x64 / etc Multiple Vulnerabilities (CENTOS-STREAM8:CLSA-2025:1744213211)

The CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS-STREAM8:CLSA-2025:1744213211 advisory. - A flaw was found in grub2. A specially crafted JPEG file can cause the JPEG parser of grub2 to incorrectly check the bounds of...

CentOS Linux 7.9 [CIQ] Security Update: grub2 / grub2-common / grub2-debuginfo / grub2-efi-ia32 / etc Multiple Vulnerabilities (ciqsa-2026_0668)

The CentOS Linux 7.9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20260668 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ CentOS Bridge 7.9. It addresses 2 CVEs: CVE-2021-3695, CVE-2021-3697. Tenable has...

Rocky Linux 8 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-ia32 / etc Multiple Vulnerabilities (ciqsa-2026_1266)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20261266 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ FIPS 8. It addresses 3 CVEs: CVE-2024-1048, CVE-2023-4693, CVE-2023-4692. Tenable has...

AlmaLinux 9.2 [TuxCare] Security Update: grub2-common / grub2-efi-aa64-modules / grub2-efi-x64 / etc (ALMALINUX9.2:CLSA-2024:1707226462)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2024:1707226462 advisory. - An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NT...