Fragment with another data representation releases an Application Relationship

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-127123
StatePUBLISHED
Assignerrt-labs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 14:17:54 UTC
Updated2026-11-13 14:17:54 UTC
DescriptionP-Net before 1.0.4 releases the Application Relationship of an RPC session, without the abort procedure, when a fragment of a request has another data representation (endianness) than the first fragment of the call. The application is not told that the Application Relationship is gone, the cyclic data stops, and the resources of the Application Relationship are left referencing a cleared structure. Another host can then connect in its place. A host with ADJACENT network access that has observed the activity UUID of the connection, which is sent in clear in every RPC request, can do this with one PDU.

Risk And Classification

Primary CVSS: v4.0 6 MEDIUM from 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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

Problem Types: CWE-404 | CWE-404 CWE-404 Improper Resource Shutdown or Release

VersionSourceTypeScoreSeverityVector
4.04b71179a-3b92-4a9d-b9fc-af8b8ed579eeSecondary6MEDIUMCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS6MEDIUMCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA RT-Labs P-Net affected 1.0.4 semver Not specified

References

ReferenceSourceLinkTags
rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdf 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee rt-labs.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to P-Net 1.0.4 or later.

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