CVE-2026-108105

MEDIUM 5.9

Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request

CVSS Score

5.9

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-617
Vendor	open5gs
Product	open5gs
Published	Oct 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

open5gs / open5gs

0 ≤ 2.8.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open5gs/open5gs/commit/346ce7a5e5cf2812bac3af042b5afba35bcf4f89 github.com: https://github.com/open5gs/open5gs github.com: https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6 github.com: https://github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c#L208-L217 vulncheck.com: https://www.vulncheck.com/advisories/open5gs-through-2.8.0-mme-reachable-assertion-via-gtpv1-sgsn-context-request

Credits

Tristan Madani