CVE-2025-36935

# CVE-2025-36935 PoC - Android Trusty trusty_ffa_mem_reclaim Uninitialized Data # This PoC demonstrates the vulnerability concept (for research purposes only) import struct import ctypes # Simulated Trusty FF-A message structure class TrustyFFAMessage(ctypes.Structure): _fields_ = [ ("cmd", ctypes.c_uint32), ("flags", ctypes.c_uint32), ("buffer_ptr", ctypes.c_uint64), ("buffer_size", ctypes.c_uint32), ] def exploit_trusty_ffa_mem_reclaim(): """ Simulated exploitation of CVE-2025-36935 The vulnerability exists in trusty_ffa_mem_reclaim() function where memory buffers are not properly initialized before use. """ print("[*] CVE-2025-36935 - Trusty FF-A Uninitialized Memory Exploitation") # Step 1: Create FF-A message for memory reclaim operation msg = TrustyFFAMessage() msg.cmd = 0x84000001 # TRUSTY_FFA_MEM_RECLAIM msg.flags = 0x0 msg.buffer_ptr = 0x0 # Uninitialized pointer msg.buffer_size = 0x1000 # Step 2: Trigger the vulnerable code path # In the vulnerable version, the buffer is not zeroed print("[*] Triggering trusty_ffa_mem_reclaim()...") print("[*] Buffer initialized: NO (vulnerable state)") # Step 3: Memory corruption occurs due to uninitialized data # Attackers can leverage residual data in memory for privilege escalation print("[!] Potential memory corruption detected") print("[!] Uninitialized memory may contain sensitive data") # Step 4: Privilege escalation print("[+] Exploitation successful - Local privilege escalation achieved") print("[+] Attacker can now execute code with elevated privileges") return True if __name__ == "__main__": print("=" * 60) print("CVE-2025-36935 Proof of Concept") print("Android Trusty trusty_ffa_mem_reclaim Uninitialized Data") print("CVSS 3.1: 7.8 (High)") print("=" * 60) try: exploit_trusty_ffa_mem_reclaim() except Exception as e: print(f"[-] Error: {e}") print("\n[*] Note: This is a simulated PoC for security research.") print("[*] Actual exploitation requires physical or ADB access to device.")

{"cve": {"id": "CVE-2025-36935", "sourceIdentifier": "[email protected]", "published": "2025-12-11T20:15:58.023", "lastModified": "2026-01-05T21:16:10.110", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In trusty_ffa_mem_reclaim of shared-mem-smcall.c, there is a possible memory corruption due to uninitialized data. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-457"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}]}]}], "references": [{"url": "https://source.android.com/security/bulletin/pixel/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}