OpenAirInterface CN5G AMF up to 2.1.9 NAS Message stack-based overflow

Summaryinfo

A vulnerability was found in OpenAirInterface CN5G AMF up to 2.1.9. It has been declared as critical. Affected by this issue is some unknown functionality of the component NAS Message Handler. The manipulation results in Remote Privilege Escalation. This vulnerability is reported as CVE-2025-65805. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in OpenAirInterface CN5G AMF up to 2.1.9. Affected is some unknown processing of the component NAS Message Handler. The manipulation with an unknown input leads to a remote privilege escalation vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-65805 since 11/18/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• OpenAirInterface

Name

• CN5G AMF

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9

CPE 2.3info

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CPE 2.2info

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