CVE-2026-8266

MEDIUM

Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_accept denial of service

Title source: cna
STIX 2.1

Description

A vulnerability was detected in Open5GS up to 2.7.7. This affects the function gsm_build_pdu_session_establishment_accept of the file /src/smf/gsm-build.c of the component SMF. The manipulation results in denial of service. The attack can be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

References (5)

Core 5
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-362563 | Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_accept denial of service
https://vuldb.com/vuln/362563
Signature, Permissions Required signature permissions-required
VDB-362563 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/vuln/362563/cti
Third Party Advisory third-party-advisory
Submit #808483 | Open5gs SMF v2.7.7 Denial of Service
https://vuldb.com/submit/808483
Exploit exploit issue-tracking
https://github.com/open5gs/open5gs/issues/4447

Scores

CVSS v3 4.3
EPSS 0.0046
EPSS Percentile 36.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-404
Status published
Products (9)
None/Open5GS 2.7.0
None/Open5GS 2.7.1
None/Open5GS 2.7.2
None/Open5GS 2.7.3
None/Open5GS 2.7.4
None/Open5GS 2.7.5
None/Open5GS 2.7.6
None/Open5GS 2.7.7
open5gs/open5gs < 2.7.7
Published May 11, 2026
Tracked Since May 11, 2026