CVE-2025-12204 MEDIUM

CVE-2025-12204: Kamailio Configuration File rvalue.c rve_destroy heap-based overflow

Vendor N/A
Product Kamailio
Weakness CWE-122
Published October 27, 2025
Last update February 24, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security vulnerability has been detected in Kamailio 5.5. Impacted is the function rve_destroy of the file src/core/rvalue.c of the component Configuration File Handler. The manipulation leads to heap-based buffer overflow. The attack must be carried out locally. The exploit has been disclosed publicly and may be used. There is ongoing doubt regarding the real existence of this vulnerability. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.

Key dates

02Disclosure timeline

October 27, 2025 CVE published
February 24, 2026 Record updated