OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages.
Date: 2026-01
Affected: openairinterface/oai-cn5g-amf
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2025-65805
CWE: CWE-121
CVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages. Unauthorized remote attackers can launch a denial-of-service attack and potentially execute malicious code by accessing port N1 and sending an imsi string longer than 1000 to AMF.


Mitigations:

Architectural layers (MAESTRO):