Buffer Overflow Vulnerability in free5gc by free5gc
CVE-2025-63679

9.8CRITICAL

Key Information:

Vendor

free5gc

Status
free5gc
Vendor
CVE Published:
12 November 2025

What is CVE-2025-63679?

The free5gc service, specifically version 4.1.0 and earlier, is susceptible to a buffer overflow vulnerability that arises when the Access and Mobility Management Function (AMF) processes an Uplink RAN Configuration Transfer NGAP message from a gNodeB (gNB). This vulnerability can result in the AMF process crashing, potentially disrupting network operations and communication integrity. Organizations using affected versions should immediately assess their systems for exposure and apply relevant mitigations.

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References

https://github.com/free5gc/free5gc/issues/725
https://gist.github.com/DDGod2025/5483d94b028d7a0c111ca23...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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