---
id: CVE-2026-108105
title: >-
  Open5GS through 2.8.0 contains a reachable assertion vulnerability in
  mme_gn_handle_sgsn_context_request() that allows remote unauthenticated
  attackers to crash the MME via malformed SGSN Address IEs
summary: >-
  Open5GS through 2.8.0 contains a reachable assertion vulnerability in
  mme_gn_handle_sgsn_context_request() that allows remote unauthenticated
  attackers to crash the MME via malformed SGSN Address IEs. Attackers sending
  GTPv1-C traffic fr…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T18:17:06.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108105'
references:
  - url: 'https://github.com/open5gs/open5gs'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c#L208-L217
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/open5gs/open5gs/commit/346ce7a5e5cf2812bac3af042b5afba35bcf4f89
    label: disclosure@vulncheck.com
  - url: 'https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open5gs-through-2.8.0-mme-reachable-assertion-via-gtpv1-sgsn-context-request
    label: disclosure@vulncheck.com
  - url: 'https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
ingestedAt: '2026-10-09T16:02:33.383Z'
---

## Overview

Open5GS through 2.8.0 contains a reachable assertion vulnerability in mme_gn_handle_sgsn_context_request() that allows remote unauthenticated attackers to crash the MME via malformed SGSN Address IEs. Attackers sending GTPv1-C traffic from a configured SGSN address with a known UE IMSI or P-TMSI can supply an invalid address length to terminate open5gs-mmed, denying service to all subscribers.

## Remediation

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