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...

Super-UEFIinSecureBoot-Disk

Super UEFIinSecureBoot Disk Super UEFIinSecureBoot Disk is a proof-of-concept not actively maintained or enhanced bootable image with GRUB2 bootloader designed to be used as a base for recovery USB flash drives. Key feature: disk is fully functional with UEFI Secure Boot mode activated. It can...

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...

Rocky Linux 8.6 [CIQ] Security Update: grub2-common / grub2-efi-aa64 / grub2-efi-aa64-cdboot / etc Multiple Vulnerabilities (ciqsa-2026_1601)

The Rocky Linux 8.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20261601 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 8.6. It addresses 26 CVEs: CVE-2021-3981, CVE-2021-20233, CVE-2020-14310,...

CVE-2025-0690

CVE-2025-0690: Integer Overflow Vulnerability in GRUB2 🛡️ Overview CVE-2025-0690 is a critical integer overflow vulnerability in the GRUB2 boot loader, allowing arbitrary code execution and Secure Boot bypass. This flaw affects systems that rely on GRUB2 for secure boot, exposing the system before...

slot2

slot2 slot2: a two-stage UEFI GRUB2 bootkit that persists a pre-OS networked implant on Amazon Linux 2023 on AWS EC2 UEFI x8664. by cenobyte [email protected] 2026 https://github.com/cenobyte-vincit/slot2 Summary slot2 is a bootkit for Amazon Linux 2023 on EC2. The AWS EC2 UEFI firmware load...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2. When attempting to mount an HFS+ partition, the hfsplus filesystem driver does not correctly set the ERRNO value. This issue may lead to a NULL pointer access...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. The Setparamprefix function in the menu rendering code performs a length calculation based on the assumption that expressing a single quoted character would require 3 characters. However, in reality, it requires 4 characters. This allows a...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module that serves as a dependency without checking whether any other dependent modules are still loaded, leading to a “use-after-free” scenario. This could allow arbitrary code to be...

Astra Linux – Vulnerability in grub2

Integer underflow in grubnetrecvip4packets; A malicious IP packet can cause an integer underflow in the grubnetrecvip4packets function, affecting the rsm-totallen value. Under certain circumstances, the totallen value may wrap around to a small integer number, which will be used in memory...

Astra Linux – Vulnerability in grub2

A vulnerability related to operations after freeing memory has been discovered in GRUB’s gettext module. This flaw arises from a programming error where the gettext command remains registered in memory even after its associated module is unloaded. An attacker can exploit this condition by invokin...

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...

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-2022-3775, CVE-2022-2601. Tenable has extracted the...

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 8 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-debugsource / grub2-efi-aa64 / etc Multiple Vulnerabilities (crlsa-2023_0049)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20230049 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...

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...

Rocky Linux 8.8 [CIQ] Security Update: grub2-common / grub2-debuginfo / grub2-efi-aa64 / etc (ciqsa-2026_1172)

The Rocky Linux 8.8 host has packages installed that are affected by a vulnerability as referenced in the CIQ ciqsa-20261172 advisory. This advisory aggregates security fixes for the grub2 SRPM in CIQ LTS 8.8. It addresses 1 CVE: CVE-2025-0624. Tenable has extracted the preceding description bloc...

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-2023-4693, CVE-2024-1048, CVE-2023-4692. Tenable has...

Rocky Linux 8 [CIQ] Security Update: grub2-common / grub2-efi-aa64 / grub2-efi-aa64-cdboot / etc (crlsa-2025_3367)

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20253367 advisory. grub2: net: Out-of-bounds write in grubnetsearchconfigfile CVE-2025-0624 Tenable has extracted the preceding description block directly from the CIQ security...

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-2023-4693, CVE-2024-1048, CVE-2025-0624, CVE-2023-469...