CVE-2026-31431

📌 CVE-2026-31431 – Privilege Escalation via AEAD Crypto Socket Misuse 🧠 Overview CVE-2026-31431 is a Linux privilege escalation vulnerability that abuses the AFALG kernel crypto API interface. By crafting a malicious interaction with AEAD Authenticated Encryption with Associated Data sockets, an...

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...

cve-2026-31431-poc

CVE 2026-31431 POC This exploit takes advantage of a flaw in the length validation of authencesn in Linux, causing dirty pages to be written back to locations the user has no permission to access, resulting in privilege escalation. The attack principle is mainly based on this repo, with some...

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...

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...

wg.copyfail.patch

CVE-2026-31431 aka Copy.Fail eBPF workaround Why it matters This CVE allows authorized user change cache copy of any readable file, which leads to Local Privilege Escalation aka local root exploit, sandbox/container escape and other issues. It works by creating AFALG socket that is provided by...

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: root@kitploit: musl-gcc -static -Os -o exploit...

CVE-2026-31431

Test, patch, fix: CVE-2026-31431 root@kitploit: Test:Check vuln python3 -c 'import socket;exec"try:s=socket.socketsocket.AFALG,socket.SOCKSEQPACKET,0;s.bind"aead","authencesnhmacsha256,cbcaes";print"vulnerable"\nexcept:print"not vulnerable""' root@kitploit: check if module Check if module...

CVE-2026-31431-CopyFail-Universal-LPE

CVE-2026-31431 "Copy Fail" — Universal LPE Exploit Linux kernel page cache 4-byte arbitrary write → Local Privilege Escalation Multiple exploit approaches: dynamic ELF entry point overwrite, full binary replacement, Python 3.x compatible with ctypes splice fallback. What is this? CVE-2026-31431 i...

Paranoid-Copy-Fail-CVE-2026-31431

root@kitploit: ================================ Paranoid AFALG hardening script ================================ Blocks all user-space kernel crypto interfaces AFALG + algif modules Mitigates CVE-2026-31431 and reduces future attack surface Safe for normal systems SSH, TLS, LUKS, WireGuard Only...

copyfail-rs

copyfail-rs Copy Fail exploit CVE-2026-31431 but in Rust, a critical vulnerability chaining AFALG and splice to achieve a 4-byte page cache write, leading to local privilege escalation on major Linux distributions. Based on the research and PoC by Xint Code. Disclaimer !CAUTION This project is fo...

copyfail

Overview Copy Fail CVE-2026-31431 is a logical vulnerability in the Linux kernel that allows a local unprivileged user to escalate privileges to superuser root. The vulnerability belongs to the Local Privilege Escalation LPE class, does not require complex exploitation conditions such as race...

cve-2026-31431-ftrace

cve-2026-31431 mitigation using ftrace The ebpf solutions around for mitigating cve-2026-31431 require lsm=bpf at boot time, which is usually not set by default. For OracleLinux this was enabled by default in UEKr7u3 and in UEKr8u1 after December 2025. To check whether or not you can use ebpf-lsm...

CVE-2026-31431

CVE-2026-31431: Copy Fail PoC + ARM64 Validation Copy Fail is a Linux local privilege escalation published by Theori/Xint as CVE-2026-31431. The project page describes a logic bug in authencesn that can be reached through AFALG and splice, producing a small page-cache write against a setuid binar...

Copy-Fail-Exploit-CVE-2026-31431

Copy Fail CVE-2026-31431 – Exploit Usage Guide ⚠️ Disclaimer This content is for educational and authorized security testing purposes only. Do NOT run this on systems without explicit permission. 📌 Overview Copy Fail CVE-2026-31431 is a Linux Local Privilege Escalation LPE vulnerability affecting...

CVE-2026-31431

copy.fail — AFALG AEAD splice primitive CVE-2026-31431 Overview This project is a C port of the original Python prototype, by offsecguy. It leverages the Linux kernel crypto API AFALG using: authencesnhmacsha256,cbcaes AEAD mode MSGMORE flag splice system call The technique feeds data from a...

cve-2026-31431

CVE-2026-31431 — "Copy Fail" Research Repository A 100% reliable Linux local privilege escalation affecting every mainstream distribution since 2017. One logic bug in authencesn, chained through AFALG and splice into a 4-byte page-cache write — silently exploitable for nearly a decade. ⚠️...

COPY-FAIL-Detection-with-Wazuh-4.14.4

COPY FAIL Detection with Wazuh 4.14.4 - CVE-2026-31431 Detection engineering for the Copy Fail kernel LPE · Ubuntu / RHEL / SUSE / Amazon Linux 2023 / Kali What is Copy Fail? CVE-2026-31431 is a logic bug in the Linux kernel's authencesn cryptographic template. It allows any unprivileged local us...

CVE_2026_31431

CVE-2026-31431 Copy Fail – Linuxカーネルのauthencesn AEADテンプレートにおける4バイトのページキャッシュ書き込みプリミティブ。AFALG + spliceを介して悪用可能。 CVE-2026-31431は、Linuxカーネルにおける決定的でレースフリーなロジックバグです。 権限のないローカルユーザーは、読み取り可能な任意のファイルのページキャッシュ内の4バイト を上書きできます。 ディスク上のファイルは一切変更されず、メモリ内のコピーのみが改変されます。...

copyfailautopatch

copyfailautopatch Detect and optionally mitigate CVE-2026-31431 "Copy Fail" on a Linux host. The vulnerability is a page-cache write primitive reachable through the AFALG socket family using the authencesnhmacsha256,cbcaes AEAD transform. This script reproduces the same primitive Theori...