CVE-2025-46115Public exploitNetwork attack vector

SMF crash via Non-GBR QoS assertion

Published Apr 30, 2026 · Updated Apr 30, 2026

Improper input validation in Open5GS 2.7.3 allows remote attackers to crash the SMF via a crafted PDU Session Modification Request. The ngap_build_pdu_session_resource_modify_transfer function treats a Non-GBR QoS flow as GBR, requires absent MBR and GBR parameters, and aborts on a failed assertion. An unauthenticated UE with two established PDU sessions can trigger the failure, interrupting SMF service until it is restarted.

CVSS severity7.5
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Open5GS 2.7.3 allows remote attackers to crash the SMF via a crafted PDU Session Modification Request. The ngap_build_pdu_session_resource_modify_transfer function treats a Non-GBR QoS flow as GBR, requires absent MBR and GBR parameters, and aborts on a failed assertion. An unauthenticated UE with two established PDU sessions can trigger the failure, interrupting SMF service until it is restarted.

The record

CVE
CVE-2025-46115
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-400Uncontrolled Resource Consumption
CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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