CVE-2026-106804

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-02 17:17:33.453000

Last modified

2026-11-02 17:17:33.453000

View original CVE JSON

{
  "id": "CVE-2026-106804",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-02T17:17:33.453",
  "lastModified": "2026-11-02T17:17:33.453",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://gist.github.com/hackeryounow/f5af75502ea6df600428c46bb9bbf39e",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/kamailio/kamailio/issues/4953",
      "source": "[email protected]"
    }
  ]
}