CVE-2025-15684

Open5GS CER init.c diam_log_func assertion

State: Published
Severity: 6.9 Medium
Published: Aug 12, 2026
Updated: Aug 13, 2026
Reserved: Aug 9, 2026

Description

A vulnerability was detected in Open5GS up to 2.7.6. Affected is the function diam_log_func of the file lib/diameter/common/init.c of the component CER Handler. The manipulation results in reachable assertion. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version 2.7.7 is able to address this issue. The patch is identified as c1a803516a3c0485696cb9bcca7a80ad857c7383. It is advisable to upgrade the affected component.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-617 Reachable Assertion

Affected Products

Product	Versions
Open5GSn/a	2.7.0Affected 2.7.1Affected 2.7.2Affected 2.7.3Affected 2.7.4Affected 2.7.5Affected 2.7.6Affected 2.7.7Not affected

References

VDB-387277 | Open5GS CER init.c diam_log_func assertionvdb-entrytechnical-description
VDB-387277 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2025-15684 | CVE Analysis and Reportthird-party-advisory
Submit #867102 | Open5GS v2.7.6-103-g1c1d9e1 Denial of Servicethird-party-advisory
https://github.com/open5gs/open5gs/issues/4155exploitissue-tracking
https://github.com/open5gs/open5gs/commit/c1a803516a3c0485696cb9bcca7a80ad857c7383patch
https://github.com/open5gs/open5gs/releases/tag/v2.7.7patch
https://github.com/open5gs/open5gs/product

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