CVE-2026-31431-Checker-Mitigator

CVE-2026-31431 Checker & Mitigator A simple, safe vulnerability scanner and mitigation tool for CVE-2026-31431 aka "Copy Fail", a local privilege escalation vulnerability in the Linux kernel's AFALG cryptographic interface. Note - It is fully vibe coded Script About the Vulnerability CVE :...

cve-2026-31431

CVE-2026-31431 This document describes a public Python exploit related to the CVE-2026-31431 vulnerability. The code demonstrates the exploitation of the flaw using primitives from the Linux AFALG subsystem, AEAD cryptographic operations, and memory manipulation via splice, with the goal of...

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...

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...

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-mitigation-suite

AFALG Defense Framework A kernel-runtime defense framework for the Linux AFALG Address Family Algorithm, family 38 subsystem. Built for Security Operations Centers running enterprise Linux fleets where Zero Trust must extend into the kernel, not stop at the network edge. Why AFALG matters to a SO...

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 root@kitploit: 1. Generate an ELF payload reverse shel...

copy-fail-CVE-2026-31431-mitigation-ansible-playbook

CVE-2026-31431 Mitigation Playbook An Ansible playbook to apply and rollback the CVE-2026-31431 AFALG kernel module mitigation on both Debian/Ubuntu and RHEL/Rocky/AlmaLinux systems. Overview This playbook mitigates CVE-2026-31431 by disabling the vulnerable algifaead kernel module: Debian/Ubuntu...

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...

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...

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...

CVE-2026-31431-live-process-code-injection

CVE-2026-31431 Copy Fail — Live Process Code Injection PoC Demonstrates arbitrary code execution in a running process via page cache. by @secinfosex What it does: 1. Compiles a test binary: check return 42; in an infinite loop 2. Launches the process 3. Waits for "check = 42" output 4. Replaces...

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...

CVE-2026-31431-Copy-Fail---Advanced-LPE-Proof-of-Concept---C-Rewrite

CVE-2026-31431 "Copy Fail" - Advanced LPE Proof-of-Concept - C Rewrite An advanced, byte-perfect Local Privilege Escalation LPE Proof-of-Concept PoC for CVE-2026-31431 , exploiting a logic flaw in the Linux kernel's cryptography subsystem algifaead. This repository contains a highly optimized C...

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,...

copy-fail-CVE-2026-31431-poc

CVE-2026-31431 — Copy Fail Proof of Concept This repository contains a Proof of Concept exploit for CVE-2026-31431 , a high-severity Linux kernel local privilege escalation vulnerability that allows any unprivileged local user to gain root access. The flaw, dubbed “Copy Fail”, resides in the...

copy-fail-CVE-2026-31431-shell

CVE-2026-31431 - copyfail shell Local privilege escalation via AFALG socket + splice page-cache overwrite. Overwrites a read-only SUID binary /usr/bin/su with a minimal ELF that calls setuid0 + execve"/bin/sh". No race condition, no per-distro offsets, single shot. root@kitploit: $...

cve-2026-31431-copyfail

CVE-2026-31431 — "Copy Fail" 🔐 Educational technical analysis of one of the most significant Linux kernel vulnerabilities since Dirty Pipe 2022. This repository is intended for research, study, and defense. No functional exploit is distributed here. Table of Contents What is it? For laypeople: th...

CVE-2026-31431-REVSHELL

root@kitploit: █▀▀ ▄▀█ █ █ █▀█ █▀█ █▀█ ▀█▀ █▀░ █▀█ █ █▄▄ █▀▄ █▄█ █▄█ ░█░ CVE-2026-31431 • Linux Kernel LPE → Root Reverse Shell Overview FailRoot is a weaponized exploit for CVE-2026-31431 — an out-of-bounds write in the Linux kernel's crypto: algifaead subsystem. It chains a privilege escalation...