CVE-2025-70122Public exploitNetwork attack vector

UPF crash via unchecked SDF Filter length

Published Feb 13, 2026 · Updated Feb 13, 2026

Heap buffer overflow in free5GC UPF 4.0.1 allows remote attackers to crash the service via a crafted PFCP Session Modification Request. SDFFilterFields.UnmarshalBinary trusts the SDF Filter's declared length and slices beyond the available buffer, causing a runtime bounds panic. No authentication or user interaction is required; exploitation terminates active PFCP sessions and disrupts connected UEs until UPF recovery.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in free5GC UPF 4.0.1 allows remote attackers to crash the service via a crafted PFCP Session Modification Request. SDFFilterFields.UnmarshalBinary trusts the SDF Filter's declared length and slices beyond the available buffer, causing a runtime bounds panic. No authentication or user interaction is required; exploitation terminates active PFCP sessions and disrupts connected UEs until UPF recovery.

The record

CVE
CVE-2025-70122
Published
Feb 13, 2026
Updated
Feb 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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-122Heap-based Buffer Overflow
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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