NULL pointer dereference in Free5gc Smf
CVE-2026-26025
free5GC SMF provides Session Management Function for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, SMF panics and terminates when processing a malformed PFCP SessionReportRequest on the PFCP (UDP/8805) interface. No known upstream fix is available, but some workarounds are available. ACL/firewall the PFCP interface so only trusted UPF IPs can reach SMF (reduce spoofing/abuse surface); drop/inspect malformed PFCP SessionReportRequest messages at the network edge where feasible, and/or add recover() around PFCP handler dispatch to avoid whole-process termination (mitigation only).
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (41.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Free5gc Smf — versions <= 1.4.1
Weakness classification (CWE)
References
- github.com/free5gc/free5gc/security/advisories/GHSA-vw8r-p7h3-g3xh (Vendor Advisory)
- github.com/free5gc/free5gc/issues/807 (Exploit, Issue Tracking)
Frequently asked questions
- What is CVE-2026-26025?
- CVE-2026-26025 is a high-severity vulnerability in Free5gc Smf, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-02-24.
- How severe is CVE-2026-26025?
- High severity. CVSS v3 base score is 7.5 out of 10.