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Description

A security flaw has been discovered in Open5GS up to 2.7.6. The impacted element is the function gmm_state_security_mode of the file src/amf/gmm-sm.c of the component NGAP Handover. Performing a manipulation results in race condition. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is regarded as difficult. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.

PUBLISHED Reserved 2026-06-01 | Published 2026-06-02 | Updated 2026-06-02 | Assigner VulDB




LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
LOW: 3.1CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
2.1AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:C

Problem types

Race Condition

Timeline

2026-06-01:Advisory disclosed
2026-06-01:VulDB entry created
2026-06-02:VulDB entry last update

Credits

Seungjoon Na (Kookmin University ICSR Lab) finder

Jinha Kim (Kookmin University ICSR Lab) finder

Seungjoon Na (VulDB User) reporter

Seungjoon Na (VulDB User) analyst

VulDB CNA Team coordinator

References

vuldb.com/vuln/367672 (VDB-367672 | Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race condition) vdb-entry technical-description

vuldb.com/vuln/367672/cti (VDB-367672 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-10565 (CVE-2026-10565 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/818938 (Submit #818938 | open5gs v2.7.6 Race Condition) third-party-advisory

github.com/open5gs/open5gs/issues/4497 issue-tracking

github.com/open5gs/open5gs/pull/4501 issue-tracking patch

github.com/...tachments/files/27111025/N2-SMC-Concurrent.zip exploit

github.com/open5gs/open5gs/ product

cve.org (CVE-2026-10565)

nvd.nist.gov (CVE-2026-10565)

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