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ZZyVOPblog.zyvop.com5d ago · 10 min read

1,313 Kernel CVEs in One Debian Update: Alarm Bell or Accounting Quirk?

Debian's security team published DSA-6528-1 with a familiar opening line: several vulnerabilities have been discovered in the Linux kernel that may lead to privilege escalation, denial of service, or

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JOJames Osterhagethehecknow.hashnode.devSep 29 · 8 min read

Implementing a Linux Device Driver in Rust

I've been looking for a new challenge lately and decided to write a device driver in Rust, and since Rust is definitely in the kernel to stay, I thought it might be helpful to other engineers or devel

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SBSufyan bin Uzayrsufyanism.hashnode.devSep 28 · 7 min read

What Happens to the CPU Cache During sched_yield

Yielding CPU execution via sched_yield() introduces catastrophic tail latency by forcing kernel register spills, Translation Lookaside Buffer evictions, and L1/L2 cache pollution. Voluntary thread swi

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4F404 Founders404-founders.comSep 20 · 9 min read

Four Linux Kernel LPEs: DirtyAH6, TUNderflow, PPPoEject, DiagSpill

Abstract Four local privilege escalation vulnerabilities were disclosed in the Linux kernel networking stack in September 2026 - DirtyAH6, TUNderflow, PPPoEject, and DiagSpill - affecting separate sub

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CRChris Royfreecodecamp.orgSep 15 · 17 min read

How to Write a Linux Kernel Module That Actually Builds

A Linux kernel module is a small piece of code that can be loaded into the running kernel without rebuilding the entire kernel. That sounds simple enough, but even a minimal module produces a surprisi

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JSJayakumar Sakthivelcloudwithjk.hashnode.devSep 11 · 15 min read

Tetragon: Kubernetes Runtime Security at the Kernel Level — Theory and Architecture

Introduction You've hardened your container images. You've written Network Policies. You've configured RBAC. You've scanned your CI/CD pipeline for vulnerabilities. And yet—a compromised container is

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CRChris Royfreecodecamp.orgSep 11 · 13 min read

How to Sandbox a Linux Process with Landlock, No Root Required

Here's a program restricting itself, then trying to read two files: without landlock: read /etc/hostname ok read /tmp/secret.txt ok with landlock, /etc allowed: read /etc/hos

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CRChris Royfreecodecamp.orgSep 9 · 17 min read

How Linux Actually Boots: From Firmware to the Login Screen

Open a terminal on any systemd machine and run this: systemd-analyze On the laptop I'm writing this on, it says: Startup finished in 5.855s (firmware) + 8.469s (loader) + 3.106s (kernel) + 12.181s (u

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CRChris Royfreecodecamp.orgSep 7 · 21 min read

How a System Call Actually Works in Linux

Here's a small C program. It calls clock_gettime() three times, then writes five bytes to standard output. #include <stdio.h> #include <time.h> #include <unistd.h> int main(void) { struct timespe

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SSagunsagunwrites.hashnode.devSep 1 · 7 min read

Windows APIs and System Calls: How Applications Reach the Operating System

When a Windows application wants to perform an operation, it cannot simply control the operating system directly. For example, an application may want to: Create a process Open a file Allocate memo

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#kernel

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Trending tags this week

1,313 Kernel CVEs in One Debian Update: Alarm Bell or Accounting Quirk?

Implementing a Linux Device Driver in Rust

What Happens to the CPU Cache During sched_yield

Four Linux Kernel LPEs: DirtyAH6, TUNderflow, PPPoEject, DiagSpill

How to Write a Linux Kernel Module That Actually Builds

Tetragon: Kubernetes Runtime Security at the Kernel Level — Theory and Architecture

How to Sandbox a Linux Process with Landlock, No Root Required

How Linux Actually Boots: From Firmware to the Login Screen

How a System Call Actually Works in Linux

Windows APIs and System Calls: How Applications Reach the Operating System