Denial of Service Vulnerability in Free5GC's SMF Component
CVE-2026-1974

6.9MEDIUM

Key Information:

Vendor

Free5GC

Status
Free5gc
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1974?

A security flaw exists in the function ResolveNodeIdToIp of Free5GC's SMF component. This vulnerability can be exploited to trigger a denial of service condition, adversely affecting service availability. The vulnerability facilitates remote exploitation, and publicly available exploits are known. Users are highly encouraged to apply the recommended patch to mitigate this issue and protect their systems from potential disruption.

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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-2026-1974 - Proof of Concept

References

https://vuldb.com/?id.344496
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344496
signaturepermissions-required
https://vuldb.com/?submit.743237
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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