CVE-2026-108105CWE-617

CVE-2026-108105

Medium · published October 9, 2026

CVSS v3.1
5.9
EPSS
1%
Percentile
43.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.2 · 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
EPSS
0.00523 · 43.5th percentile
Weakness
CWE-617 · Reachable Assertion
Published
2026-10-09T19:17Z
References (6)
https://github.com/open5gs/open5gs · [email protected]https://github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c#L208-L217 · [email protected]https://github.com/open5gs/open5gs/commit/346ce7a5e5cf2812bac3af042b5afba35bcf4f89 · [email protected]https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6 · [email protected]https://www.vulncheck.com/advisories/open5gs-through-2.8.0-mme-reachable-assertion-via-gtpv1-sgsn-context-request · [email protected]https://github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 09 OCT 14:08Z
    Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
    cvelistv5
  • 09 OCT 14:08Z
    Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
    cvelistv5