Open5GS AMF nsmf-handler.c amf_nsmf_pdusession_handle_update_sm_context denial of service

[nixpkgs-security-tracker]

• CVE-2026-7587
• Nixpkgs security tracker issue
• affected package maintainers: cc @Bot-wxt1221, @xddxdd

Description

A vulnerability has been found in Open5GS up to 2.7.7. This vulnerability affects the function amf_nsmf_pdusession_handle_update_sm_context of the file /src/amf/nsmf-handler.c of the component AMF. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

References

• [Bug]: AMF crash on NSMF /modify success response with n2SmInfoType=PDU_RES_SETUP_REQ in the wrong state open5gs/open5gs#4408 (exploit, issue-tracking)

4.3 MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

• CVSS version: 3.1
• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): Low (L)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): None (N)
• Integrity (I): None (N)
• Availability (A): Low (L)
• Exploit Code Maturity (E): Proof-of-Concept (P)
• Remediation Level (RL): Not Defined (X)
• Report Confidence (RC): Reasonable (R)

Affected packages

• open5gs (2.7.7@nixos-25.11, 2.7.7@nixos-unstable)