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.

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)
.