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CVE-2025-12206— Kamailio rvalue.c rve_is_constant null pointer dereference

Quick assessment

Affected
n/a Kamailio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kamailio是Kamailio开源的一个 SIP 信令服务器的开源实现。 Kamailio 5.5版本存在代码问题漏洞，该漏洞源于文件src/core/rvalue.c中的函数rve_is_constant存在空指针取消引用，可能导致本地攻击。

CVSS 3.3 · Low EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection
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I. Basic Information for CVE-2025-12206

Vulnerability Information
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Vulnerability Title
Kamailio rvalue.c rve_is_constant null pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Kamailio 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kamailio是Kamailio开源的一个 SIP 信令服务器的开源实现。 Kamailio 5.5版本存在代码问题漏洞，该漏洞源于文件src/core/rvalue.c中的函数rve_is_constant存在空指针取消引用，可能导致本地攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Kamailio 5.5 cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-12206

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III. Intelligence Information for CVE-2025-12206

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Vendor Advisories for CVE-2025-12206 (3)

Same Patch Batch · n/a · 2025-10-27 · 45 CVEs total

CVE-2025-12248 7.3 HIGH CLTPHP search.html sql injection
CVE-2025-12286 7.0 HIGH VeePN AVService avservice.exe unquoted search path
CVE-2025-12268 6.3 MEDIUM LearnHouse Course Thumbnail courses unrestricted upload
CVE-2025-12310 5.3 MEDIUM VirtFusion Email Change _settings excessive authentication
CVE-2025-12204 5.3 MEDIUM Kamailio Configuration File rvalue.c rve_destroy heap-based overflow
CVE-2025-12205 5.3 MEDIUM Kamailio Configuration File cfg.lex sr_push_yy_state use after free
CVE-2025-12245 5.3 MEDIUM chatwoot Widget IFrameHelper.js initPostMessageCommunication origin validation
CVE-2025-12250 4.7 MEDIUM OpenWGA TMLScript API WGA.File path traversal
CVE-2025-12276 4.3 MEDIUM LearnHouse Image information disclosure
CVE-2025-12270 4.3 MEDIUM LearnHouse Student Assignment Submission sub_file resource injection
CVE-2025-12246 4.3 MEDIUM chatwoot Admin IframeLoader.vue cross site scripting
CVE-2025-12264 3.5 LOW Wisencode Create Support Ticket create cross site scripting
CVE-2025-12269 3.5 LOW LearnHouse Account Setting previews cross site scripting
CVE-2025-12251 3.5 LOW OpenWGA Admin UI cross site scripting
CVE-2025-12207 3.3 LOW Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference
CVE-2025-61385 pg8000 安全漏洞
CVE-2025-61099 FRRouting FRR 安全漏洞
CVE-2025-61100 FRRouting 安全漏洞
CVE-2025-61102 FRRouting FRR 安全漏洞
CVE-2025-54965 BAE Systems SOCET GXP 安全漏洞

Showing top 20 of 45 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Kamailio
Same vendor: n/a
Same weakness: CWE-476

V. Comments for CVE-2025-12206

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