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Public proof of concept

CVE-2026-106805

Resource Exhaustion During PFCP Session Establishment in Free5GC Leading to Denial of Service

A public proof of concept exists; no exploitation attested.

  • Published2026-11-02
  • WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A resource exhaustion issue exists in Free5GC v4.2.3 during PFCP Session Establishment failure handling. When the SMF does not receive a PFCP Session Establishment Response from the UPF, allocated UE IP address resources are not properly released. Repeated failed session establishment attempts can therefore exhaust the UE IP address pool, preventing new UEs from establishing PDU sessions and resulting in denial of service.

Timeline

dates in UTC
  1. 2026-11-02CVE publishedCNA

Versions per branch

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-106805 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-11-02
Last Modified
2026-11-05
NVD status
Deferred
GitHub Advisory
GHSA-j2m9-hp34-9gm7

Frequently asked questions

What is CVE-2026-106805?

A resource exhaustion issue exists in Free5GC v4.2.3 during PFCP Session Establishment failure handling. When the SMF does not receive a PFCP Session Establishment Response from the UPF, allocated UE IP address resources are not properly released. Repeated failed session establishment attempts can therefore exhaust the UE IP address pool, preventing new UEs from establishing PDU sessions and resulting in denial of service.

Is CVE-2026-106805 actively exploited?

A proof-of-concept exploit exists for CVE-2026-106805, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-106805?

CVE-2026-106805 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record