CVE-2026-30075Public exploitNetwork attack vector

Unauthenticated service crash via oversized authentication response

Published Apr 8, 2026 · Updated Apr 8, 2026

Buffer overflow in OpenAirInterface AUSF 2.2.0 allows remote attackers to crash the service with an oversized 5G authentication response. AUSF handles the 105-byte resStar without enforcing the specification length, triggering stack-smashing termination during verification. A crafted Authentication Response sent through the AMF is sufficient; the AUSF exit blocks subsequent subscriber registration and verification.

CVSS severity7.5
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in OpenAirInterface AUSF 2.2.0 allows remote attackers to crash the service with an oversized 5G authentication response. AUSF handles the 105-byte resStar without enforcing the specification length, triggering stack-smashing termination during verification. A crafted Authentication Response sent through the AMF is sufficient; the AUSF exit blocks subsequent subscriber registration and verification.

The record

CVE
CVE-2026-30075
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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