Null Pointer Dereference Vulnerability in Free5GC SMF by Free5GC
CVE-2026-1973

6.9MEDIUM

Key Information:

Vendor

Free5GC

Status
Free5gc
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1973?

A vulnerability in Free5GC's SMF component allows remote attackers to trigger a null pointer dereference through manipulation of the establishPfcpSession function. This can lead to potential service disruptions and is considered a critical security concern. It's essential for users to apply the latest patches to mitigate this vulnerability and protect their systems from possible exploitation.

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Affected Version(s)

Free5GC 4.0

Free5GC 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-2026-1973 - Proof of Concept

References

https://vuldb.com/?id.344495
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344495
signaturepermissions-required
https://vuldb.com/?submit.743236
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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