bootloader

An out-of-bounds memcpy in U-Boot’s NFS code left development and diskless systems open to remote compromise — a subtle, high‑impact bug tracked as CVE‑2019‑14194 that illustrates how a single failed length check in bootloader networking code can translate into full system compromise. The...

Das U‑Boot ships with a dangerous surprise in its NFS reply handling: a stack‑based buffer overflow in the nfs_mount_reply helper (tracked as CVE‑2019‑14203) that affects U‑Boot releases up through and including 2019.07 and — in certain configurations — permits remote attackers controlling a...

Das U-Boot's DHCP code contains a subtle but dangerous buffer overread that has been tracked as CVE-2024-42040: an attacker on the local or adjacent network can feed crafted DHCP responses that cause net/bootp.c to copy memory beyond the received packet, leaking between 4 and 32 bytes of host...

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...

I switched from a comfortable, decades‑long Windows routine to a Linux desktop and promptly broke things — repeatedly — and learned far more about how operating systems, bootloaders, codecs, and recovery processes actually work than I ever did clicking “Next” through Windows installers. The...

I am using Hyper-V in Windows 11 Pro. I have very little experience with Hyper-V and VMs, so treat me like I'm a 7-year-old. I've been using a USB drive in a virtual machine. I've been following the operation where I start the VM, open disk management on the host machine, take the USB drive...

I'm up a gumtree without a paddle. I have been running around in circles for a week trying to get this solved. I had migrated my old HDD with Windows 10 Pro on it over to a new machine, and a new SATA SSD drive. I used Macrium Reflect to image the drive over. This was an MBR booted system...

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...

For many newcomers and even seasoned users, the thought of updating the Linux kernel evokes a sense of apprehension. The kernel, after all, is the beating heart of any Linux distribution, dictating how software interacts with hardware and forming the core of your computer’s operating system...

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...

With the end of mainstream support for Windows 10 fast approaching, many PC users are evaluating their options for the future. While some are willing to embrace change by jumping ship to Linux, abandoning Windows entirely isn’t an appealing option for everyone. Whether it’s out of necessity for...

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...

The latest Safe OS Dynamic Update for Windows 11, as referenced in KB5061090 and released on June 26, 2025, offers crucial support for users of Windows 11 versions 22H2 and 23H2. Much more than a routine patch, these Safe OS Dynamic Updates are integral, under-the-hood components designed to...

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...

Here’s a summary of what’s new and important in Rufus 4.8, based on the provided article: Key Changes & Improvements in Rufus 4.8: Major Speed Boost (WIMLIB Integration): Rufus now uses wimlib for all Windows Imaging (WIM) processing. This results in much faster image analysis when opening...

When it comes to operating systems, few questions spark debate like the prospect of running macOS on a Windows PC. With Microsoft Windows dominating the desktop scene—clinging to a market share of over 70% and thriving on its open hardware compatibility—it seems natural to wonder: Is it...

my windows got deleted and now when I boot up my laptop it says checking media, then it let's me choose the boot devices but there is only one, and when I choose it restarts again from checking media. please help