copy_fail

Copy Fail — CVE-2026-31431 CVE-2026-31431 Copy Fail is a local privilege escalation vulnerability in the Linux kernel's algifaead module AFALG subsystem. A logic flaw introduced in August 2017 allows any unprivileged local user to write 4 controlled bytes into the page cache of any readable file...

CVE-2026-31431-PoC

CVE-2026-31431 PoC Local Privilege Escalation in the Linux Kernel via algifaead Page Cache Write "Copy Fail" Author: Van Glenndon Enad Original Discovery: Theori / Xint Code Research Team Taeyang Lee Published: April 29, 2026 Severity: High CVSS v3.1 Score: 7.8 CVSS v3.1 Vector:...

GhostShell

GhostShell CVE-2026-31431 — Local Privilege Escalation via Linux Kernel Page Cache Corruption GhostShell is a local privilege escalation tool that exploits a flaw in the Linux kernel's authencesn AEAD crypto implementation to obtain a root shell from an unprivileged user account. It corrupts the...

cve_2026_31431_audit

CVE-2026-31431 Audit This project provides a professional Python script designed to check if a system is vulnerable to CVE-2026-31431 and demonstrates how to exploit it for research purposes. 🎬 Full Workflow The diagram below illustrates the complete workflow from Environment Audit SCAN, Patch...

CVE-2026-31431-CopyFail-static-ELF--POC

CVE-2026-31431: Copy Fail - 587-byte static ELF I did not find this bug. Credit goes to Xint Code / Theori. This repo is my take on making the exploit as small as possible - a hand-rolled x8664 ELF that does the full LPE in 587 bytes. No libc, no linker, no runtime. Just NASM and stubbornness. In...

CVE-2026-31431-RCE-Exploit

🔴 CVE-2026-31431 — "Copy Fail" A 9-Year-Old Linux Kernel Logic Bug That Grants Root in Seconds Overview Copy Fail is a high-severity local privilege escalation LPE vulnerability in the Linux kernel's cryptographic subsystem algifaead. Discovered and disclosed by Theori via their Xint Code...

Copy-Fail---CVE-2026-31431

CVE-2026-31431 - Copy Fail - Detection Script Python script to check whether a Linux system is vulnerable to the CVE-2026-31431 Copy Fail flaw, a local privilege escalation in the Linux kernel. The flaw in brief Since 2017 commit 72548b093ee3, the kernel's algifaead cryptographic module has handl...

RK35xx-CopyFail-Hotfix

RK35xx Kernel Patch: CVE-2026-31431 "Copy Fail" RK35xx CopyFail Hotfix: CVE-2026-31431 Patch for Joshua Riek's Ubuntu 24.04 A community-provided, pre-compiled kernel patch for all RK35xx single-board computers Rock 5, Orange Pi 5, NanoPC, etc. running Joshua Riek's Ubuntu 24.04 Kernel...

Copy-fail-CVE-2026-31431-Exploit-in-C

Copy-fail-CVE-2026-31431-Exploit-in-C Discovery and original disclosure of CVE-2026-31431: Theori / Xint. Public writeup: https://copy.fail/. Overview This program targets the Linux kernel’s AFALG AEAD path and attempts to trigger the “Copy Fail” page-cache corruption behavior described in public...

copy-fail-cve-2026-31431

Copy Fail - CVE-2026-31431 This repository provides a Go port of the public Copy Fail PoC and a reproducible build pipeline for multi architecture Linux binaries. Copy Fail CVE-2026-31431 is a Linux kernel logic flaw in authencesn that enables a deterministic 4 byte write into page cache data...

CVE-2026-31431

CVE-2026-31431 — Copy Fail 中文版 732 Bytes to Root on Every Major Linux Distribution CVE-2026-31431 Copy Fail is a logic bug in the Linux kernel's authencesn cryptographic template. It allows an unprivileged local user to trigger a deterministic, controlled 4-byte write into the page cache of any...

CVE-2026-31431-PocC

CVE-2026-31431-PoC CVE-2026-31431 PoC reproduced in C, usable for exploitation when Python is not available on the target environment. Vulnerability Basic Information Vulnerability type: Linux kernel AFALG subsystem page cache poisoning, achieving local privilege escalation and possible container...

CopyFail-for-dummies

Copy Fail / CVE-2026-31431 — Research Notes Overview This repository contains a cleaned-up technical diagram and supporting notes for the Linux kernel vulnerability commonly referred to as Copy Fail and tracked as CVE-2026-31431. The purpose of this material is: to explain the bug mechanism at a...

CVE-2026-31431-Copy-Fail-add-arm64

Vulnerability Overview Item| Content ---|--- CVE ID| CVE-2026-31431 Vulnerability Name| Copy Fail Vulnerability Type| Linux Kernel Local Privilege Escalation LPE CVSS 3.1 Score| 7.8 HIGH CWE| CWE-669: Incorrect Resource Transfer Between Spheres Affected Scope| All Linux kernels built between 2017...

copy-fail-go

copy-fail-go Go port of grenkoca's Python PoC for CVE-2026-31431 copy-fail. This version compiles to a fully static binary with zero runtime dependencies - no Python, no pip, no libc version constraints. Drop it on any Linux target and run it. It also automatically enumerates all SUID...

Linux-copy-fail-CVE-2026-31431

CVE-2026-31431 — Copy Fail Linux Privilege Escalation Overview This repository presents a technical overview and demonstration of CVE-2026-31431 , commonly referred to as Copy Fail , a Linux kernel vulnerability that enables local privilege escalation. The vulnerability affects a wide range of...

copy-fail-CVE-2026-31431

Vulnerability Description Root Cause In 2017, the Linux kernel crypto module authencesn introduced an in-place optimization for AEAD Authenticated Encryption with Associated Data operations. This optimization caused read-only pages in the page cache to be incorrectly placed into a writable...

CVE-2026-31431-exploit

CVE-2026-31431 WARNING These Linux LPE exploit implementations are runtime-destructive. They overwrite the live page-cache view of privileged targets such as: su PAM configuration files any file passed into patch mode This is usually not a normal persistent on-disk edit, but it does change runtim...

CVE-2026-31431-PoC

Copy Fail - Python 3.9 PoC CVE-2026-31431 The public Copy Fail exploit wasn't compaitble with python 3.9, this one is. The original was modifed by replacing the unavailable os.splice with a lightweight ctypes polyfill. 🚨 LEGAL DISCLAIMER CFAA & Related Laws THIS SOFTWARE IS PROVIDED FOR EDUCATION...

CVE-2026-31431

CVE-2026-31431 — Local Privilege Escalation via AFALG 2026-04-29 — I am publishing this exploit one day after sharing it on theMyDigitalLife forum. It does not require Python; it is written in C and compiled to the smallest possible size using: musl-gcc -static -Os -o exploit exploit.c -s Critica...