grub

GNU GRUB (GRUB2) contains a timing side‑channel in its cryptographic comparison routine: CVE‑2024‑56738 identifies that versions through 2.12 implement grub_crypto_memcmp in a non‑constant‑time way, which can leak sensitive verification information via timing differences and has prompted vendor...

A newly disclosed use‑after‑free bug in the GRUB2 bootloader — tracked as CVE‑2025‑61663 — arises from a missing unregister call in the normal command module and can cause a local attacker who can invoke GRUB commands to crash the bootloader or the host, prompting immediate patching from...

A newly assigned CVE — CVE-2025-61664 — exposes a robustness flaw in the GRUB2 bootloader’s normal module: the command handler for normal_exit is not unregistered when the module is unloaded, leaving a dangling command pointer that can be invoked later and produce a kernel-mode use-after-free...

UEFI Secure Boot on Arm64 is usable today but fragmented: the essential pieces exist, many mainstream distributions already support it, and a growing set of EDK II UEFI firmware ports make an x86‑like Secure Boot experience possible — yet the practical reality for users and enterprises remains...

I've spent more desktop-hours than I care to admit wrestling with Windows quirks, updates that bork drivers, and the slow creep of "feature" changes that don't feel like improvements — so when I first booted a Linux live USB, selected a completely different desktop environment from the login...

If you’re thinking about escaping Windows 11’s telemetry creep or simply want to test a modern Linux desktop without committing, installing Linux alongside Windows — or replacing it entirely — remains the most practical option for most users. This guide walks a careful, practical path through...

Dual-booting between Linux and Windows, or even between two distinct Linux distributions, offers the best of both worlds—the versatility of Linux and the familiarity or specialized needs addressed by Windows. Yet, every dual-booter at some point confronts a daunting scenario: suddenly, one of...

Details - Dual boot system; Windows 11 & Ubuntu - I run Ubuntu most of the time but a couple of days ago I re-booted in an attempt to login to Windows, but didn’t get my Grub screen. Last boot to Windows was fine with no issues back a couple of weeks ago. during the first recent boot attempt...

Hello mob! Yesterday I was installing Linux Mint on a USB key, I repeat, ON, from another live USB key, and at some point GRUB took the place of the Windows Bootloader. I am not sure when, as everything was installed on the USB key, with the bootloader was to be put on the USB key, I even...

For years, the Grand Unified Bootloader (GRUB) has served as the linchpin for multi-boot Linux systems, making it an ever-relevant component for tinkerers, professionals, and those daring enough to run Windows and Linux on the same hardware. But a recent flurry of updates—spurred by both...

Dual-booting Windows and Linux on a single computer remains one of the most effective ways to enjoy the best of both operating systems without compromise. Yet, as many seasoned users discover, simply installing both operating systems is only the beginning. Ensuring they coexist harmoniously...

For millions of users worldwide, dual-booting Windows and Linux has been a popular approach to getting the best of both operating systems on a single device. The flexibility this provides—offering Linux’s rich development environment and Windows’ compatibility with a wide range of consumer and...

Microsoft has long been at the forefront of cybersecurity innovation, and its latest use of Security Copilot to unearth vulnerabilities in widely used open-source bootloaders is a compelling example of how artificial intelligence can strengthen our digital defenses. In this deep dive, we’ll...

Microsoft’s threat intelligence team has turned the tables on bootloader vulnerabilities using the cutting-edge powers of artificial intelligence. In a recent breakthrough, researchers leveraged Microsoft’s Security Copilot tool to uncover at least 20 critical vulnerabilities lurking in popular...

The rapid evolution of artificial intelligence is transforming the cybersecurity landscape, and one example is its role in uncovering vulnerabilities in open-source bootloaders. Microsoft’s recent research leveraged Security Copilot to identify multiple vulnerabilities in GRUB2—a common Linux...

Understanding CVE-2022-3775: Heap-based Out-of-bounds Write in GRUB2 Overview of CVE-2022-3775 CVE-2022-3775 is a significant security vulnerability identified in the GRUB2 bootloader, which is widely utilized in various operating systems, including Linux distributions and indirectly affecting...

On August 13, 2024, the Microsoft Security Response Center (MSRC) published important information regarding CVE-2022-2601, a critical vulnerability linked to the GRUB2 bootloader. This flaw, identified as a buffer overflow vulnerability in the grub_font_construct_glyph function, has far-reaching...

Overview of the Incident In a surprising blunder, Microsoft's latest monthly patch update has inadvertently rendered many dual-boot Windows and Linux systems inoperable. Users of these systems have found themselves confronted with a distressing error message: “something has gone seriously...

Greetings! I have windows 11 pro running on a dell laptop i had an nvme storage upgrade few months ago so i cloned my windows onto there, which created two identical options for windows boot manager in the bios boot selection menu , yet windows will always load up from ssd.. everything was...

there is these error happened when I have done a window update,any