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CVE-2026-127123 Fragment with another data representation releases an Application Relationship

6.0 medium

Medium (6.0) in rt-labs p-net.

On this page
P-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.

Severity

CVSS 4.0

6.0 medium
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
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-404 Improper Resource Shutdown or Release
Published
Modified
Assigned by
rt-labs (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
RT-Labs P-Netbefore 1.0.4

Attack patterns (CAPEC)

  • CAPEC-125 Flooding Likelihood: High · Severity: Medium
  • CAPEC-130 Excessive Allocation Likelihood: Medium · Severity: Medium
  • CAPEC-131 Resource Leak Exposure Likelihood: Medium · Severity: Medium
  • CAPEC-494 TCP Fragmentation
  • CAPEC-495 UDP Fragmentation
  • CAPEC-496 ICMP Fragmentation
  • CAPEC-666 BlueSmacking Likelihood: Medium · Severity: Medium

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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