High severity · published Feb 24, 2026
CVE-2026-26025
free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.USAR=1 and UsageReport omits mandatory URRID sub-IE 
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SM
smf · free5gc
<= 1.4.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26025
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26025
Exploit
https://github.com/free5gc/free5gc/issues/807
Vendor Advisory
https://github.com/free5gc/free5gc/security/advisories/GHSA-vw8r-p7h3-g3xh
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