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

CVE-2025-70123

CVE-2025-70123

Description

An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

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Affected products

3
  • Free5gc/Free5gc3 versions
    cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:free5gc:free5gc:4.0.1:*:*:*:*:*:*:*
    • (no CPE)
    • (no CPE)range: = 4.0.1

Patches

Vulnerability mechanics

References

1

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