CVE-2026-108105

EUVD-2026-95795
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 42.64%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
open5gsopen5gs
𝑥
≤ 2.8.0
CNA
Common Weakness Enumeration
References
https://github.com/open5gs/open5gs
https://github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c#L208-L217
https://github.com/open5gs/open5gs/commit/346ce7a5e5cf2812bac3af042b5afba35bcf4f89
https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6
https://www.vulncheck.com/advisories/open5gs-through-2.8.0-mme-reachable-assertion-via-gtpv1-sgsn-context-request
https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6