Heap Buffer Overflow Vulnerability in free5GC by free5GC
CVE-2025-70122

7.5HIGH

Key Information:

Vendor

free5GC

Status
free5GC
Vendor
CVE Published:
13 February 2026

What is CVE-2025-70122?

A heap buffer overflow vulnerability manifests in the UPF component of free5GC v4.0.1, enabling remote attackers to trigger a denial of service. This issue arises in the SDFFilterFields.UnmarshalBinary function, particularly when handling a declared length that surpasses the buffer's capacity, which can result in a runtime panic and subsequent UPF crash. It highlights a critical need for robust input validation and buffer management to safeguard against such exploit attempts.

References

https://github.com/free5gc/free5gc/issues/746

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

.