CVE-2025-70121 Details
Description
An array index out of bounds vulnerability in the AMF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted 5GS Mobile Identity in a NAS Registration Request message. The issue occurs in the GetSUCI method (NAS_MobileIdentity5GS.go) when accessing index 5 of a 5-element array, leading to a runtime panic and AMF crash.
A denial-of-service vulnerability has been identified in the AMF component of free5GC version 4.0.1. This issue arises from an array index out of bounds error in the processing of 5GS Mobile Identity within NAS Registration Request messages. Remote attackers can exploit this vulnerability by sending crafted messages, causing a runtime panic that crashes the AMF service. The flaw is located in the GetSUCI method of the NAS_MobileIdentity5GS.go file, where the code improperly accesses index 5 of a 5-element array, leading to a service disruption in the 5G core network.
Users are advised to upgrade to the latest release of free5GC that includes the patch for this vulnerability. The fix has been implemented in the free5GC/nas repository, PR #43.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/free5gc/free5gc/issues/747 | [email protected] | ExploitIssue TrackingVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| free5gc free5gc | 4.0.1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 13, 2026 | CVE Modified | CISA-ADP |
| Feb 13, 2026 | New CVE Received | [email protected] |