CVE-2026-31559: Linux Kernel LoongArch空指针解引用漏洞

#include <stdio.h> #include <stdlib.h> #include <string.h> /* * PoC Simulation for CVE-2026-31559 * This C code simulates the missing NULL check after kstrdup(). * In the actual kernel vulnerability, this leads to a kernel panic/oops. * Here, it causes a segmentation fault to demonstrate the crash. */ void vulnerable_parse_model(const char *model_name) { // Simulate kstrdup() returning NULL due to allocation failure char *model_copy = NULL; // Vulnerability: Missing NULL check before using model_copy printf("Parsing CPU Model: %s\n", model_copy); } int main() { printf("[+] Simulating CVE-2026-31559 trigger...\n"); vulnerable_parse_model("Loongson-3A5000"); return 0; }