CVE-2023-37023: OPEN5GS

High severity, CVSS 8.6. EPSS: 0.8% chance of exploitation in the next 30 days.

Open5GS MME versions <= 2.6.4 contain a reachable assertion in the `Uplink NAS Transport` packet handler. A packet missing its `MME_UE_S1AP_ID` field causes Open5gs to crash; an attacker may repeatedly send such packets to cause denial of service.

Affected products

• OPEN5GS OPEN5GS: up to and including 2.6.4

Published 2025-01-22. Last modified 2026-06-17.