Null Pointer Dereference in Free5GC SMF PFCP UDP Endpoint
CVE-2026-1682

6.9MEDIUM

Key Information:

Vendor

Free5gc

Status
Smf
Vendor
CVE Published:
30 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1682?

A vulnerability exists in the Free5GC Service Management Function (SMF) up to version 4.1.0, specifically within the HandlePfcpAssociationReleaseRequest function in the PFCP UDP Endpoint component. This flaw allows attackers to exploit a null pointer dereference, which can lead to unexpected application behavior and potential denial of service. The attack can be executed remotely, making it critical for users to apply the necessary patches to safeguard their systems against this exploit.

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Affected Version(s)

SMF 4.0

SMF 4.1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1682 - Proof of Concept

References

https://vuldb.com/?id.343475
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343475
signaturepermissions-required
https://vuldb.com/?submit.739508
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ZiyuLin (VulDB User)
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