NULL pointer dereference in Free5gc
CVE-2026-1973
A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. It is best practice to apply a patch to resolve this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Free5gc
- Free5gc — versions 4.0, 4.1.0
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/free5gc/free5gc/issues/815 (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- github.com/free5gc/free5gc/issues/815 (issue-tracking, Exploit, exploit, Issue Tracking, Vendor Advisory)
- github.com/free5gc/smf/pull/189 (issue-tracking, patch, Issue Tracking)
- github.com/free5gc/free5gc/ (Product, product)
Frequently asked questions
- What is CVE-2026-1973?
- CVE-2026-1973 is a medium-severity vulnerability in Free5gc, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2026-02-06.
- How severe is CVE-2026-1973?
- Medium severity. CVSS v3 base score is 5.3 out of 10.