CVE-2026-108105
Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
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.
INFO
Published Date :
Oct. 9, 2026, 2:08 p.m.
Last Modified :
Oct. 9, 2026, 2:08 p.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Open5GS to version 2.8.1 or later.
- Apply vendor patches for the identified vulnerability.
- Configure network to validate SGSN Address IE lengths.
- Monitor MME for malformed GTPv1-C traffic.
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CVE-2026-108105 vulnerability anywhere in the article.