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Mayank Mahajan1d ago · 11 min read

What Really Happens When You Run npm run dev? User Space vs Kernel Space Explained

I have VS Code open. I type npm run dev in the terminal and a Node.js server starts. Chrome is playing a YouTube video in another window. Nothing looks strange. But right now, three big applications a

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Asep SayyadOct 22 · 18 min read

Tuning the Linux Kernel for 10x Traffic: How We Prepared a Modest Cloud Server for the Hug of Death

Somaxconn, SYN backlogs, TCP syncookies, and finding our breaking point with stepped Autocannon load benchmarks. The alert hit our channel at 11:14 AM on a Tuesday. Our product had just been picked up

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MuzasioOct 21 · 18 min read

Store-and-Forward: What a Router Really Does With Your Packet

Most of us studied circuit and packet switching as course material. Here is what it actually looks like inside a router. The textbook defines store-and-forward in one sentence: a packet switch "must r

muzasio.hashnode.dev

Sui GnOct 12 · 3 min read

Building Management System (BMS)

What if a smart building could maintain its own state without constantly recomputing everything? Modern Building Management Systems (BMS) coordinate thousands of interconnected data points: HVAC, temp

neurons-me.hashnode.dev

ZyVOPOct 4 · 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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James OsterhageSep 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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Sufyan bin UzayrSep 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

sufyanism.hashnode.dev

404 FoundersSep 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

404-founders.com

Chris RoySep 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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Jayakumar SakthivelSep 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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