CVE-2026-23334 Linux内核f81604驱动拒绝服务漏洞

/* * Conceptual PoC for CVE-2026-23334 * Triggering the vulnerability requires sending a short interrupt URB * to the F81604 USB CAN interface driver. * This typically requires a malicious USB device or emulating one. */ #include <linux/usb.h> #include <linux/module.h> // This is a conceptual representation. In a real scenario, // a hardware device would send a shorter packet than expected by the driver. void trigger_short_urb(struct usb_device *udev) { // Simulate sending a shorter interrupt message int expected_length = 16; int actual_length = 4; // Short packet // The vulnerable driver fails to check 'actual_length' vs 'expected_length' // before processing the buffer, leading to the crash. printk(KERN_INFO "Sending malformed URB to trigger CVE-2026-23334\n"); // Malicious action would happen here via USB hardware manipulation } // Note: Actual exploitation requires physical access or virtualization to emulate USB device behavior.