Log in Start free

Vulnerability · Published Oct 27, 2025 · Assigned by VulDB

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

Low 3.3

In plain English

A low-severity null pointer dereference in Kamailio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12kamailiono fix listedDEBIAN-CVE-2025-12206
Debian:13kamailiono fix listedDEBIAN-CVE-2025-12206
Debian:14kamailiono fix listedDEBIAN-CVE-2025-12206
Ubuntu:22.04:LTSkamailiono fix listedUBUNTU-CVE-2025-12206
Ubuntu:24.04:LTSkamailiono fix listedUBUNTU-CVE-2025-12206
Ubuntu:25.10kamailiono fix listedUBUNTU-CVE-2025-12206
Ubuntu:26.04:LTSkamailiono fix listedUBUNTU-CVE-2025-12206
Ubuntu:26.10kamailiono fix listedUBUNTU-CVE-2025-12206

Affected products (as reported)

VendorProductVersions
n/a Kamailio 5.5

Weakness: CWE-476, CWE-404 · Vector: 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

References