CVE-2026-127125

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-127125", "assignerOrgId": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "state": "PUBLISHED", "assignerShortName": "rt-labs", "dateReserved": "2026-11-12T15:30:49.638Z", "datePublished": "2026-11-13T13:25:53.422Z", "dateUpdated": "2026-11-13T13:25:53.422Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "shortName": "rt-labs", "dateUpdated": "2026-11-13T13:25:53.422Z"}, "title": "NULL pointer dereference when a response fragment is not acknowledged", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference", "type": "CWE"}]}], "affected": [{"vendor": "RT-Labs", "product": "P-Net", "versions": [{"status": "affected", "version": "0", "lessThan": "1.0.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "P-Net before 1.0.4 aborts the Application Relationship of an RPC session when a fragment of a response has been resent without being acknowledged, without checking that the session has an Application Relationship. A request for an existing Application Relationship that is sent on another activity than its Connect, and gets a fragmented response, is handled on a session without one. If the response is not acknowledged, a NULL pointer is dereferenced and the device crashes. A conformant IO-controller does not send such requests. The attacker must have observed the AR UUID of an established Application Relationship and requires ADJACENT network access.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>P-Net before 1.0.4 aborts the Application Relationship of an RPC session when a fragment of a response has been resent without being acknowledged, without checking that the session has an Application Relationship. A request for an existing Application Relationship that is sent on another activity than its Connect, and gets a fragmented response, is handled on a session without one. If the response is not acknowledged, a NULL pointer is dereferenced and the device crashes. A conformant IO-controller does not send such requests. The attacker must have observed the AR UUID of an established Application Relationship and requires ADJACENT network access.</p>"}]}], "references": [{"url": "https://rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdf", "name": "Cybersecurity advisory for P-Net"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "Upgrade to P-Net 1.0.4 or later.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to P-Net 1.0.4 or later.</p>"}]}], "source": {"discovery": "INTERNAL"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "P-Net", "vendor": "RT-Labs", "versions": [{"lessThan": "1.0.4", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "P-Net before 1.0.4 aborts the Application Relationship of an RPC session when a fragment of a response has been resent without being acknowledged, without checking that the session has an Application Relationship. A request for an existing Application Relationship that is sent on another activity than its Connect, and gets a fragmented response, is handled on a session without one. If the response is not acknowledged, a NULL pointer is dereferenced and the device crashes. A conformant IO-controller does not send such requests. The attacker must have observed the AR UUID of an established Application Relationship and requires ADJACENT network access."}], "id": "CVE-2026-127125", "lastModified": "2026-11-13T14:17:55.190", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "type": "Secondary"}]}, "published": "2026-11-13T14:17:55.077", "references": [{"source": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "url": "https://rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdf"}], "sourceIdentifier": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "4b71179a-3b92-4a9d-b9fc-af8b8ed579ee", "type": "Secondary"}]}

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