CVE-2026-127124
RPC session pool exhausted by unfinished fragmented requests
P-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.
Fixes and workarounds
Fix
Upgrade to P-Net 1.0.4 or later.
Source: CNA: rt-labsAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| P-Net RT-Labs |
≥ 0; < 1.0.4 (affected, semver)
Other versions: unaffected |
CNA: rt-labs |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
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 | CNA: rt-labs |
| 4.0 / 7.1 high |
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 | NVD: 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdfCNA: rt-labs
- https://rt-labs.com/wp-content/uploads/2026/11/RRTL-261109-01.pdf4b71179a-3b92-4a9d-b9fc-af8b8ed579ee
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