CVE-2025-12205

Local memory corruption via crafted configuration file

Published Oct 27, 2025 · Updated Oct 27, 2025

Use-after-free in Kamailio SIP Server 5.5 allows local users to corrupt memory by loading a crafted configuration file. The reported flaw is in sr_push_yy_state in src/core/cfg.lex, but no retrievable report explains which allocation is freed and then reused. Exploitation requires permission to edit the server configuration, and the Kamailio project disputes the report because its referenced test files were unavailable.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Kamailio SIP Server 5.5 allows local users to corrupt memory by loading a crafted configuration file. The reported flaw is in sr_push_yy_state in src/core/cfg.lex, but no retrievable report explains which allocation is freed and then reused. Exploitation requires permission to edit the server configuration, and the Kamailio project disputes the report because its referenced test files were unavailable.

The record

CVE
CVE-2025-12205
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Kamailio Project
Product
Kamailio SIP Server
Classifications
CWE-416, CWE-119
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Kamailio Project · Kamailio SIP Serverversion=5.5

Published CVSS scores

5.3Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo