NULL pointer dereference in Linuxfoundation Upf
CVE-2025-65566
A denial-of-service vulnerability exists in the omec-project UPF (pfcpiface component) in version upf-epc-pfcpiface:2.1.3-dev. When the UPF receives a PFCP Session Report Response that is missing the mandatory Cause Information Element, the session report handler dereferences a nil pointer instead of rejecting the malformed message. This triggers a panic and terminates the UPF process. An attacker who can send PFCP Session Report Response messages to the UPF's N4/PFCP endpoint can exploit this flaw to repeatedly crash the UPF and disrupt user-plane services.
EPSS: 0.003 (21.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linuxfoundation Upf — versions 2.1.3
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2025-65566?
- CVE-2025-65566 is a high-severity vulnerability in Linuxfoundation Upf, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2025-12-18.
- How severe is CVE-2025-65566?
- High severity. CVSS v3 base score is 7.5 out of 10.