Description
A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Published: 2026-05-10
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability resides in the SMF component of Open5GS, specifically in smf_n4_build_qos_flow_to_modify_list. Manipulation of this function can lead to denial of service. The issue affects all Open5GS releases up to version 2.7.7 and can be executed remotely.

Affected Systems

All Open5GS deployments implementing the SMF component, versions 2.7.7 and earlier. The vendor is Open5GS and the product is the SMF module within the Open5GS 5G core network software.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity; EPSS is not available, and the vulnerability is not listed in CISA KEV, but the exploit is publicly disclosed and usable. The attack can be executed remotely and leads to denial of service. Without a patch, the risk remains unless mitigated by limiting exposure.

Generated by OpenCVE AI on May 11, 2026 at 00:51 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade to a patched Open5GS release that addresses the issue
  • If an upgrade is not immediately possible, block or restrict external access to the SMF component from untrusted networks
  • Monitor SMF logs and system stability for signs of crashes and take corrective action promptly

Generated by OpenCVE AI on May 11, 2026 at 00:51 UTC.

Tracking

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Advisories

No advisories yet.

History

Mon, 11 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 10 May 2026 23:00:00 +0000

Type Values Removed Values Added
Description A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Title Open5GS SMF n4-build.c smf_n4_build_qos_flow_to_modify_list denial of service
First Time appeared Open5gs
Open5gs open5gs
Weaknesses CWE-404
CPEs cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*
Vendors & Products Open5gs
Open5gs open5gs
References
Metrics cvssV2_0

{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}

Subscriptions

Open5gs Open5gs
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-05-11T14:42:15.314Z

Reserved: 2026-05-10T14:40:04.579Z

Link: CVE-2026-8250

cve-icon Vulnrichment

Updated: 2026-05-11T14:42:12.037Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-10T23:16:27.403

Modified: 2026-05-11T15:10:16.663

Link: CVE-2026-8250

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T01:00:14Z

Weaknesses