CVE-2025-12206 json
Kamailio rvalue.c rve_is_constant null pointer dereference
published 2025-10-27 12 mo ago modified 2026-10-19 21 d ago also EUVD-2025-36070
- cvss
- 3.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P |
| CNA | 3.1 | 3.3 | 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 |
| CNA | 3.0 | 3.3 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R |
| CNA | 2.0 | 1.7 | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR |
| CNA | 4.0 | 1.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 2.0 | 1.7 | AV:L/AC:L/Au:S/C:N/I:N/A:P |
Affected products
- n/a Kamailio
Classification
References
-
shimo.im
/docs/aBAYMVMB2jUP9jAj/
exploit, third-party-advisory
-
shimo.im
/docs/aBAYMVMB2jUP9jAj
exploit, third-party-advisory
-
vuldb.com
/?id.329876
vdb-entry, technical-description, third-party-advisory
-
vuldb.com
/?ctiid.329876
signature, permissions-required, vdb-entry
-
vuldb.com
/?submit.673240
third-party-advisory, vdb-entry
-
openwall.com
/lists/oss-security/2025/11/02/3
related
-
openwall.com
/lists/oss-security/2025/10/27/8
issue-tracking, mailing-list
- openwall.com /lists/oss-security/2025/10/27/12
- openwall.com /lists/oss-security/2025/10/27/8
Sources
- CVE List CVE-2025-12206
- NVD CVE-2025-12206
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.