CVE-2025-54334

/* * CVE-2025-54334 PoC - NPU Driver NULL Pointer Dereference * Target: Samsung Exynos Processors (1280, 2200, 1380, 1480, 2400, 1580, 2500) * This PoC demonstrates triggering the NULL pointer dereference in __npu_vertex_bootup * Note: This is a conceptual PoC for educational purposes only */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> /* Simulated NPU device structure */ struct npu_device { void *hdev; /* Hardware device handle - can be NULL */ int state; unsigned long regs; }; /* Vulnerable function - __npu_vertex_bootup */ int npu_vertex_bootup(struct npu_device *npu) { /* VULNERABILITY: Missing NULL check for npu->hdev */ /* If npu->hdev is NULL, dereferencing it will cause crash */ /* Simulate accessing hdev members without NULL check */ volatile unsigned long *reg_ptr = (unsigned long *)npu->hdev; *reg_ptr = 0x12345678; /* NULL pointer dereference occurs here */ return 0; } /* Function to trigger the vulnerability */ int trigger_npu_vulnerability(void) { struct npu_device *npu = NULL; /* Allocate device structure */ npu = (struct npu_device *)malloc(sizeof(struct npu_device)); if (!npu) { printf("[-] Failed to allocate npu device\n"); return -1; } /* VULNERABILITY SCENARIO: hdev is not initialized (NULL) */ npu->hdev = NULL; /* Intentionally set to NULL to trigger vulnerability */ npu->state = 0; npu->regs = 0; printf("[*] Triggering CVE-2025-54334 NULL pointer dereference...\n"); printf("[*] npu->hdev = %p (NULL)\n", npu->hdev); /* This call will trigger NULL pointer dereference */ npu_vertex_bootup(npu); free(npu); return 0; } int main(int argc, char *argv[]) { printf("===========================================\n"); printf("CVE-2025-54334 PoC\n"); printf("Samsung Exynos NPU Driver NULL Pointer Dereference\n"); printf("===========================================\n\n"); trigger_npu_vulnerability(); return 0; } /* * ATTACK CHAIN: * 1. Attacker identifies target device with vulnerable Exynos processor * 2. Attacker crafts malicious NPU request/operation * 3. Request triggers __npu_vertex_bootup function * 4. hdev pointer is NULL or not properly initialized * 5. Code attempts to dereference NULL pointer * 6. Kernel panic / system crash occurs (DoS) * * REQUIREMENTS: * - Target device with vulnerable Exynos processor * - Ability to send NPU operations (may require root/privileged access) * - Knowledge of specific trigger conditions for __npu_vertex_bootup */

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