CVE-2025-70122 Details
Description
A heap buffer overflow vulnerability in the UPF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted PFCP Session Modification Request. The issue occurs in the SDFFilterFields.UnmarshalBinary function (sdf-filter.go) when processing a declared length that exceeds the actual buffer capacity, leading to a runtime panic and UPF crash.
A heap buffer overflow vulnerability has been identified in the UPF component of free5GC version 4.0.1. This vulnerability allows remote attackers to cause a denial-of-service by sending a crafted PFCP Session Modification Request. The issue arises in the SDFFilterFields.UnmarshalBinary function within sdf-filter.go, where the parser fails to validate the length of SDF Filter Information Elements, leading to out-of-bounds memory access, a runtime panic, and a crash of the UPF network element.
The vulnerability has been patched. Users should upgrade to the next release of free5GC that includes this fix.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/free5gc/free5gc/issues/746 | [email protected] | ExploitIssue TrackingVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| free5gc free5gc | 4.0.1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 13, 2026 | CVE Modified | CISA-ADP |
| Feb 13, 2026 | New CVE Received | [email protected] |