---
id: CVE-2026-117068
title: >-
  An integer underflow vulnerability in the NAS decoder of OpenAirInterface
  (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a
  denial of service (DoS) via crafted NAS Registration Requests containing a
  truncated SUC…
summary: >-
  An integer underflow vulnerability in the NAS decoder of OpenAirInterface
  (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a
  denial of service (DoS) via crafted NAS Registration Requests containing a
  truncated SUC…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-06T19:14:16.233775Z'
exploitAvailable: true
published: '2026-11-02'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T19:14:19.713Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-117068'
references:
  - url: 'https://github.com/openairinterface/oai-cn5g-ausf/issues/7'
  - url: 'https://gist.github.com/hackeryounow/aa1df06bb785bda0952a30939dcb9a76'
  - url: >-
      https://github.com/openairinterface/oai-cn5g-amf/pull/26/commits/c5178c644f87c5ef8828353192fea464d977e17b
tags:
  - cve.org
  - exploit-available
epss: 0.00424
epssPercentile: 0.36905
ingestedAt: '2026-11-05T19:30:42.725Z'
---

## Overview

An integer underflow vulnerability in the NAS decoder of OpenAirInterface (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a denial of service (DoS) via crafted NAS Registration Requests containing a truncated SUCI in the 5GS Mobile Identity IE. Insufficient length validation in the DecodeSuci() function results in an out-of-bounds heap read, causing the AMF process to crash.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.