CVE-2026-108105
Deferred Deferred - Pending Action

Open5GS MME Denial of Service via Malformed SGSN Context Request

Publication date: 2026-10-09

Last updated on: 2026-10-09

Assigner: VulnCheck

Description
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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-09
Last Modified
2026-10-09
Generated
2026-10-09
AI Q&A
2026-10-09
EPSS Evaluated
N/A
NVD
CVE-2026-108105
EUVD
EUVD-2026-95795

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
open5gs open5gs 0

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-617 The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

Open5GS through version 2.8.0 has a flaw in the mme_gn_handle_sgsn_context_request() function where a malformed SGSN Address Information Element (IE) can trigger a reachable assertion. This allows unauthenticated remote attackers to crash the Mobility Management Entity (MME) by sending specially crafted GTPv1-C traffic. The attack requires a configured SGSN address with a known UE IMSI or P-TMSI and an invalid address length to terminate the open5gs-mmed process, disrupting service for all subscribers.

Impact Analysis

This vulnerability can cause a denial of service for all mobile subscribers connected to the affected Open5GS MME. The crash of open5gs-mmed terminates service, preventing legitimate users from making calls, sending messages, or accessing data. Since it is remotely exploitable without authentication, attackers can disrupt network operations without needing direct access.

Mitigation Strategies

Upgrade Open5GS to a version later than 2.8.0 to address the reachable assertion vulnerability in mme_gn_handle_sgsn_context_request().

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-108105. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart