RPC session pool exhausted by unfinished fragmented requests

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-127124
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 keeps the RPC session that is allocated for a fragment of a request with an unknown activity UUID, without a timeout, when the rest of the request never arrives. A session that does not get an Application Relationship is also kept after the response. Repeated fragments or requests with different activity UUIDs exhaust the available sessions, one UDP packet per session. Once they are exhausted the device no longer answers a Connect request until it is restarted. An unauthenticated attacker with ADJACENT network access can use this to cause a denial of service.

Risk And Classification

Primary CVSS: v4.0 7.1 HIGH from 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee

CVSS:4.0/AV:A/AC:L/AT:N/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

Problem Types: CWE-772 | CWE-772 CWE-772 Missing Release of Resource after Effective Lifetime

VersionSourceTypeScoreSeverityVector
4.04b71179a-3b92-4a9d-b9fc-af8b8ed579eeSecondary7.1HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.1HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

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

CVSS:4.0/AV:A/AC:L/AT:N/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

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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