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High severity7.5NVD Advisory· Published Feb 13, 2026· Updated Jun 17, 2026

CVE-2025-70122

CVE-2025-70122

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.

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Affected products

3
  • Free5gc/Free5gcllm-fuzzy3 versions
    =4.0.1+ 2 more
    • (no CPE)range: =4.0.1
    • cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*
    • (no CPE)

Patches

Vulnerability mechanics

References

1

News mentions

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