What is the CVSS score of CVE-2025-70122?

CVE-2025-70122 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Free5gc are affected by CVE-2025-70122?

A critical denial-of-service vulnerability in free5GC's UPF component (CVE-2025-70122) allows remote attackers to crash 5G network infrastructure through malformed session modification requests.

Is there a public PoC exploit available for CVE-2025-70122?

Yes, a public proof-of-concept exploit is available for CVE-2025-70122. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-70122?

Within 24 hours: Inventory all free5GC v4.0.1 deployments and assess production exposure; enable detailed logging on PFCP traffic for forensic capability. Within 7 days: Implement network-level controls isolating UPF components from untrusted networks; deploy WAF/IDS rules to detect and block malformed PFCP Session Modification Requests; establish incident response procedures for DoS events. Within 30 days: Prepare upgrade path to patched free5GC version when available; consider architectural changes to implement UPF redundancy and failover mechanisms to improve resilience.

Free5gc CVE-2025-70122

HIGH

Heap-based Buffer Overflow (CWE-122)

2026-02-13 cve@mitre.org

Buffer Overflow Denial Of Service Free5gc

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

PoC Detected

Feb 18, 2026 - 15:40 vuln.today

Public exploit code

CVE Published

Feb 13, 2026 - 17:16 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

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. [CVSS 7.5 HIGH]

Technical ContextAI

Classified as CWE-122 (Heap-based Buffer Overflow). Affects the UPF component of Free5Gc. 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.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

CVE-2025-70122 vulnerability details – vuln.today

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Free5gc CVE-2025-70122

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code