CVE-2026-23447 Linux内核cdc_ncm越界读取漏洞

/* * PoC Concept for CVE-2026-23447 * Triggering out-of-bounds read in cdc_ncm_rx_verify_ndp32 * This requires a malicious USB device or emulation. */ #include <linux/module.h> #include <linux/usb.h> // Malicious NTB structure construction struct malicious_ntb { struct usb_cdc_ncm_ndp32_hdr ndp; // Place NDP near the end to trigger the bug // where ndpoffset is not properly accounted for }; static int __init poc_init(void) { printk(KERN_INFO "Attempting to trigger CVE-2026-23447\n"); // In a real scenario, this would involve sending a specially // crafted USB packet where the NDP32 offset is manipulated // to cause skb->len validation to pass but actual access to OOB. return 0; } static void __exit poc_exit(void) { printk(KERN_INFO "PoC unloaded\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");