CVE-2025-25774Public exploitNetwork attack vector

AMF crash via unhandled policy response

Published Mar 12, 2025 · Updated Mar 12, 2025

Denial of service in the AMF in Open5GS 2.7.2 allows attackers controlling a UE to crash the AMF through timed gNB handovers. The gmm_state_authentication function treats an unexpected Npcf_AMPolicyControl response as an invalid service and reaches an assertion because no matching case handles it. A UE must repeatedly switch between two gNBs at the vulnerable timing; the crash disconnects active UEs and blocks new registrations until the AMF restarts.

CVSS severity6.5
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the AMF in Open5GS 2.7.2 allows attackers controlling a UE to crash the AMF through timed gNB handovers. The gmm_state_authentication function treats an unexpected Npcf_AMPolicyControl response as an invalid service and reaches an assertion because no matching case handles it. A UE must repeatedly switch between two gNBs at the vulnerable timing; the crash disconnects active UEs and blocks new registrations until the AMF restarts.

The record

CVE
CVE-2025-25774
Published
Mar 12, 2025
Updated
Mar 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-691, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-691Insufficient Control Flow Management
T1499.004Application or System Exploitation Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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