CVE-2026-106804
CVE-2026-106804
A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_qos_npn module. The w_rx_aar_register() function copies the attacker-controlled host field from the SIP `Via` header into a fixed 46-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger the vulnerability with a crafted SIP `REGISTER` request, causing stack corruption and termination of the affected Kamailio instance, resulting in denial of service.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| n/a n/a |
Version not specified (affected) | CNA: mitre |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | ADP: CISA-ADP |
Exploit evidence
- https://github.com/kamailio/kamailio/issues/4953
exploit · ADP: CISA-ADP
References
- https://github.com/kamailio/kamailio/issues/4953CNA: mitre
- https://gist.github.com/hackeryounow/f5af75502ea6df600428c46bb9bbf39eCNA: mitre
- https://github.com/kamailio/kamailio/issues/4953ADP: CISA-ADP · exploit
- https://gist.github.com/hackeryounow/f5af75502ea6df600428c46bb9bbf39e[email protected]
- https://github.com/kamailio/kamailio/issues/4953[email protected]
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