Array Index Out of Bounds in free5GC AMF Component Affects Mobile Network Security
CVE-2025-70121

7.5HIGH

Key Information:

Vendor

free5GC

Status
free5GC
Vendor
CVE Published:
13 February 2026

What is CVE-2025-70121?

An array index out of bounds vulnerability exists in the Access and Mobility Management Function (AMF) component of free5GC v4.0.1. This flaw enables remote attackers to exploit a crafted 5GS Mobile Identity within a NAS Registration Request, particularly in the GetSUCI method. The issue arises when accessing the 5th index of a 5-element array, causing a runtime panic and resulting in a denial of service as the AMF crashes. This vulnerability underscores the necessity for robust input validation mechanisms to avert unauthorized access and ensure network stability.

References

https://github.com/free5gc/free5gc/issues/747

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.