How I Analyzed the Linux Kernel's Deadliest Logic Bug: A Deep Dive into Dirty Pipe (CVE-2022-0847)

May 22, 2026 · 6:34 AM UTC ·14 min read · 0 reactions · 0 comments · 45 views

#linux #security #kernel #vulnerability #programming

TL;DR · WeSearch summary

The article provides an in-depth analysis of the Dirty Pipe vulnerability in the Linux kernel, identified as CVE-2022-0847. It explains how a simple logic bug allowed unprivileged users to write to read-only files due to an uninitialized struct member. The author details the mechanisms involved, including the Page Cache and the splice() system call, which contributed to the vulnerability's exploitation.

Key facts

▪The Dirty Pipe vulnerability allowed unprivileged users to write to read-only files.
▪It was caused by an uninitialized struct member in the kernel's memory-management path.
▪The article explains the interaction between the Page Cache, pipes, and the splice() system call that led to the bug.

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Original publisher	DEV.to (Top)
Canonical URL	https://dev.to/amirsefati/how-i-analyzed-the-linux-kernels-deadliest-logic-bug-a-deep-dive-into-dirty-pipe-cve-2022-0847-57f5
Publication time	Fri, 22 May 2026 06:34:56 +0000
Retrieval time	2026-05-22T07:02:00.842Z
Last seen	2026-05-22T07:02:00.842Z
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Opening excerpt (first ~120 words) tap to expand

try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 161199) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } amir Posted on May 22 How I Analyzed the Linux Kernel's Deadliest Logic Bug: A Deep Dive into Dirty Pipe (CVE-2022-0847) #linux #security #kernel #c As developers, we often think of kernel exploits as highly complex assembly-level wizardry, heap grooming, or race-condition battles. But recently, I decided to sit down, pull up the Linux kernel source code, and trace the infamous Dirty Pipe vulnerability, CVE-2022-0847, line by line.

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