本地提权 / 容器逃逸 CVE-2026-31431
使用方式：
go build -ldflags="-s -w" -o CopyFail CVE-2026-31431.go
./CopyFail
影响版本：
Ubuntu 18.04, 20.04, 22.04, 24.04
Debian 11, 12, 13
RHEL 8, 9, 10
CentOS 8
Rocky Linux 8, 9, 10
AlmaLinux 8, 9, 10
Fedora 33-42
Alibaba Cloud Linux 2, 3, 4
SUSE 12, 15, 16
Amazon Linux 2023
Oracle Linux 7,8,9,10
