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TI-2025-11190 Aliases CVE-2025-12207GHSA-c7cc-4r75-qhxm

Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference

Priority MEDIUM 55CWE-404Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Kamailio5.5—No fix listedCNA
  • Kamailio Vendor— Affected 5.5 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*5.5.0Vulnerablekamailio
  • cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:* Versions 5.5.0 Vulnerable ·kamailio

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-12207
  2. 2026-10-03 Alias added: GHSA-c7cc-4r75-qhxm

References

Exploit 2

Other 1

  • TI-2020-16681 The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields… CVSS 3.1CRITICAL 9.8
  • TI-2018-06372 A Buffer Overflow issue was discovered in Kamailio before 4.4.7, 5.0.x before 5.0.6, and… CVSS 3.0CRITICAL 9.8
  • TI-2018-10598 In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with a double "To"… CVSS 3.0CRITICAL 9.8
  • TI-2016-02145 Heap-based buffer overflow in the encode_msg function in encode_msg.c in the SEAS module… CVSS 3.0CRITICAL 9.8
  • TI-2025-11189 Kamailio rvalue.c rve_is_constant null pointer dereference CVSS 4.0MEDIUM 4.8
  • TI-2025-11188 Kamailio Configuration File cfg.lex sr_push_yy_state use after free CVSS 4.0MEDIUM 4.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences