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. The vendor was contacted early about this disclosure but did not respond in any way.

References

• https://nvd.nist.gov/vuln/detail/CVE-2025-12204
• https://shimo.im/docs/loqeMWMyZGtpEYqn
• https://vuldb.com/?ctiid.329874
• https://vuldb.com/?id.329874
• https://vuldb.com/?submit.673224
• https://www.openwall.com/lists/oss-security/2025/10/27/8
• https://www.openwall.com/lists/oss-security/2025/11/02/3
• http://www.openwall.com/lists/oss-security/2025/10/27/12
• http://www.openwall.com/lists/oss-security/2025/10/28/1