CVE-2026-108105
Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 9, 2026
- Updated
- Oct 9, 2026
- Reserved
- Oct 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-617 Reachable Assertion
Affected Products
| Product | Versions |
|---|---|
open5gsopen5gs |
|
References
- Patch Commitpatch
- https://github.com/open5gs/open5gsproduct
- GitHub Security Advisory (GHSA-9crh-64c8-56q6)vendor-advisory
- https://github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c#L208-L217technical-description
- VulnCheck Advisory: Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Requestthird-party-advisory
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