Cyber Resilience

CVE-2026-30075

Memory Safety in Openairinterface Oai-Cn5G-Amf 2.2.0

Public PoCMemory Safety
Published
08 April 2026
Modified
25 July 2026
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0038 31th percentile
Risk Priority 57 floored blend · peak EPSS

Summary

CVE-2026-30075 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Openairinterface Oai-Cn5G-Amf. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 31th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-30075 is a buffer overflow vulnerability (CWE-120) affecting OpenAirInterface version 2.2.0, specifically in the AUSF (Authentication Server Function) component of the OAI-CN5G suite. The issue arises during processing of an UplinkNASTransport message containing an Authentication Response with a NAS PDU that includes an oversize response, such as one exceeding 100 bytes. The AMF (Access and Mobility Management Function) decodes the response and forwards it to AUSF for verification, triggering the overflow and subsequent crash in AUSF. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high availability impact with no confidentiality or integrity effects.

The vulnerability can be exploited remotely over the network by unauthenticated attackers with low complexity and no user interaction required. An attacker crafts and sends a malicious UplinkNASTransport message with an oversized Authentication Response NAS PDU, which causes the AUSF component to crash upon receipt. This results in a denial-of-service condition, preventing legitimate users from completing registration and authentication processes.

The issue is tracked in GitLab repositories for the oai-cn5g-ausf project, specifically issue #6, where details on the buffer overflow and its impact on AUSF are documented. No specific patch or mitigation details are outlined in the provided CVE references.

EU & UK References

Vulnerability Data

OpenAirInterface Version 2.2.0 has a Buffer Overflow vulnerability in processing UplinkNASTransport containing Authentication Response containing a NAS PDU with oversize response (For example 100 byte). The response is decoded by AMF and passed to the AUSF component for verification. AUSF…

more

crashes on receiving this oversize response. This can prohibit users from further registration and verification and can cause Denial of Services (DoS).

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-65805Same product: Openairinterface Oai-Cn5G-Amf
CVE-2025-66786Same product: Openairinterface Oai-Cn5G-Amf
CVE-2026-30078Same product: Openairinterface Oai-Cn5G-Amf
CVE-2026-30079Same product: Openairinterface Oai-Cn5G-Amf
CVE-2026-30080Same product: Openairinterface Oai-Cn5G-Amf
CVE-2025-26265Same vendor: Openairinterface
CVE-2026-30077Same vendor: Openairinterface
CVE-2025-25900Shared CWE-120
CVE-2026-30006Shared CWE-120
CVE-2026-43807Shared CWE-120

Affected Assets

openairinterface
oai-cn5g-amf
2.2.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
prevents

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.

References