CVE-2026-108105 Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
Remote attackers can crash the Open5GS MME by sending malformed GTPv1-C packets, causing a denial of service for all subscribers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108105?
CVE-2026-108105 is a high-severity denial of service vulnerability in open5gs, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-617
Which versions are affected by CVE-2026-108105?
How do I fix CVE-2026-108105?
No fix has been published for CVE-2026-108105 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-108105 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108105 exists.
Sources
Also known as GHSA-9crh-64c8-56q6, GHSA-ch22-9c64-r8wh.