CVE-2025-29339: OPEN5GS

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue in UPF in Open5GS UPF versions up to v2.7.2 results an assertion failure vulnerability in PFCP session parameter validation. When processing a PFCP Session Establishment Request with PDN Type=0, the UPF fails to handle the invalid value propagated from SMF (or via direct attack), triggering a fatal assertion check and causing a daemon crash.

Affected products

• OPEN5GS OPEN5GS: up to and including 2.7.2

Published 2025-04-22. Last modified 2026-06-17.