CVE-2025-12207
Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference
CVSS Score
3.3
EPSS Score
0.0%
EPSS Percentile
0th
A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. 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.
| CWE | CWE-476 CWE-404 |
| Vendor | n/a |
| Product | kamailio |
| Published | Oct 27, 2025 |
| Last Updated | Feb 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / Kamailio
5.5
References
vuldb.com: https://vuldb.com/?id.329877 vuldb.com: https://vuldb.com/?ctiid.329877 vuldb.com: https://vuldb.com/?submit.673241 shimo.im: https://shimo.im/docs/vVqRMVMlrycMO63y/ openwall.com: https://www.openwall.com/lists/oss-security/2025/11/02/3 openwall.com: https://www.openwall.com/lists/oss-security/2025/10/27/8 openwall.com: http://www.openwall.com/lists/oss-security/2025/10/27/12 openwall.com: http://www.openwall.com/lists/oss-security/2025/10/27/8 shimo.im: https://shimo.im/docs/vVqRMVMlrycMO63y
Credits
🔍 zh_vul (VulDB User) VulDB