CVE-2025-29632

MEDIUM

free5gc 4.0.0 - Buffer Overflow via AMF NGAP Handler

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-29632. PoCs published by OHnogood.

AI-analyzed exploit summary This PoC exploits a DoS vulnerability in free5gc (CVE-2025-29632) by sending a malformed NGAP message with an empty NAS-PDU, causing the AMF to crash during message parsing. The script establishes an SCTP connection and sends a crafted hex payload to trigger the vulnerability.

Description

Buffer Overflow vulnerability in Free5gc v.4.0.0 allows a remote attacker to cause a denial of service via the AMF, NGAP, security.go, handler_generated.go, handleInitialUEMessageMain, DecodePlainNasNoIntegrityCheck, GetSecurityHeaderType components

Exploits (1)

nomisec WORKING POC
by OHnogood · poc
https://github.com/OHnogood/CVE-2025-29632

This PoC exploits a DoS vulnerability in free5gc (CVE-2025-29632) by sending a malformed NGAP message with an empty NAS-PDU, causing the AMF to crash during message parsing. The script establishes an SCTP connection and sends a crafted hex payload to trigger the vulnerability.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: free5gc versions 4.0.0 and earlier
No auth needed
Prerequisites: Network access to the AMF SCTP port (default 38412) · Python environment with `sctp` module
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 5.4
EPSS 0.0031
EPSS Percentile 22.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
free5gc/free5gc 4.0.0
Published May 29, 2025
Tracked Since Feb 18, 2026