CVE-2022-21894-Payload-New

This is a simple example payload for CVE-2022-21894 that demonstrates how an attacker could map a second stage payload in order to be able to call EFI services. A writeup of this vulnerability can be viewed here: https://github.com/Wack0/CVE-2022-21894. The code in this repository extends the PoC...

BlackLotus-Detection

CVE-2022-21894 Public repo for anything CVE-2022-21894 Main page https://www.microsoft.com/en-us/security/blog/2023/04/11/guidance-for-investigating-attacks-using-cve-2022-21894-the-blacklotus-campaign/ Windows Defender now capable of removing this threat "Possible vulnerable EFI bootloader " Bas...

efiSeek

efiSeek for Ghidra About The analyzer automates the process of researching EFI files, helps to discover and analyze well-known protocols, smi handlers, etc. Features Finds known EFI GUID's Identifies protocols located with LOCATEPROTOCOL function Identifies functions used as the NOTIFY function...

BootHole

BootHole General information This repository was created to contain relevant helpful scripts and any additional tools or information that can assist others in managing their BootHole vulnerability mitigation plans. Windows Based Platforms We have created a Powershell script that will check the EF...

ghidra-firmware-utils

Ghidra Firmware Utilities Various modules for Ghidra to assist with PC firmware reverse engineering. This was accepted as a coreboot project for GSoC 2019. Features PCI option ROM loader Implements a FS loader for PCI option ROMs handles hybrid ROMs with multiple images, e.g. legacy x86 + UEFI...

CVE-2022-21894-Payload

This is a simple example payload for CVE-2022-21894 that demonstrates how an attacker could map a second stage payload in order to be able to call EFI services. A writeup of this vulnerability can be viewed here: https://github.com/Wack0/CVE-2022-21894. The code in this repository extends the PoC...

CVE-2017-2751

You'll find the .tex and .pdf file for CVE-2017-2751, a BIOS/EFI password extraction for consumer HP laptops...

UEFI-Security-Research-Howyar-SysReturn-NetCopy

🌊 UEFI Security Research - Howyar SysReturn NetCopy Under the cloak of Secure Boot, some architectures sink deeper than the vulnerabilities that exposed them. Some binaries are revoked. Some patches are shipped. But deep below the surface, old habits leave traces. This is what remains when a...

CVE-2026-25250

🕷️ CVE-2026-25250: Improper Trusted Bootloader Chain Validation A Microsoft-signed third-party bootloader that loads a secondary EFI binary with no signature or integrity verification, collapsing the Secure Boot chain of trust from within. 📑 Table of Contents Research Context Official References...

HvLoader

HvLoader Overview HvLoader.efi is an EFI application for loading an external hypervisor loader. HvLoader.efi loads a given hypervisor loader binary DLL, EFI, etc., and calls it's entry point passing HvLoader.efi ImageHandle. This way the hypervisor loader binary has access to HvLoader.efi's comma...

Siemens SIMATIC S7-1500 TM MFP Release of Invalid Pointer or Reference (CVE-2026-23352)

In the Linux kernel, the following vulnerability has been resolved: x86/efi: defer freeing of boot services memory efifreebootservices frees memory occupied by EFIBOOTSERVICESCODE and EFIBOOTSERVICESDATA using memblockfreelate. There are two issue with that: memblockfreelate should be used for...

Astra Linux – vulnerability in linux-6.1, linux-6.12

In the Linux kernel, the following vulnerability has been resolved: efi/capsule-loader: fix incorrect sizeof in phys array reallocation The krealloc call for capinfo-phys in eficapsulesetupinfo uses sizeofphysaddrt instead of sizeofphysaddrt, which might be causing an undersized allocation. The...

Astra Linux – vulnerability in linux-6.12

In the Linux kernel, the following vulnerability has been resolved: efi: Allocate runtime workqueue before ACPI init Since commit 5894cf571e14 “acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers” ACPI PRM calls are delegated to a workqueue which runs in a kernel thread, making it easier to...

SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:4706-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4706-1 advisory. The SUSE Linux Enterprise 15 SP7 kernel was updated to fix various security issues: The following security...

Astra Linux – Vulnerability in Linux 5.15

In the efirtasmwrapper of efi-rt-wrapper.S, there is a possible way to bypass shadow stack protection due to a logical error in the code. This could result in a local escalation of privileges without the need for additional execution privileges. User interaction is not required for exploitation...

Astra Linux – vulnerability in linux-5.15

In the Linux kernel, the following vulnerability has been resolved: arm64: efi: Make efirtlock a rawspinlock Running a rt-kernel base on 6.2.0-rc3-rt1 on an Ampere Altra outputs the following: BUG: sleeping function called from invalid context at kernel/locking/spinlockrt.c:46 inatomic: 1,...

Astra Linux – vulnerability in linux-5.10, linux-5.15, linux-6.1

In the Linux kernel, the following vulnerability has been resolved: efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption The TPM event log table is a Linux-specific construct; its data generated by the GetEventLog boot service is cached in memory and passed to the OS via an EFI...

Astra Linux - Vulnerability in linux-5.10, linux, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: efi: fix potential NULL dereference in efimemreservepersistent When iterating over a linked list, the result of memremap is dereferenced without checking it for NULL. This patch adds a check that falls back to allocating a new pa...

Astra Linux – vulnerability in edk2

The BootPerformanceTable pointer is read from an NVRAM variable within PEI. It is recommended to set PcdFirmwarePerformanceDataTableS3Support to FALSE...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: EFI: In runtime mode, a potential overflow of the size of the soft-reserved region has been fixed. If there are pages worth ≥ 4GB in a soft-reserved region, the value of mdsize will be reduced...