CVE-2026-106803

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_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-02 17:17:33.270000

Last modified

2026-11-02 17:17:33.270000

View original CVE JSON

{
  "id": "CVE-2026-106803",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-02T17:17:33.270",
  "lastModified": "2026-11-02T17:17:33.270",
  "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_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, 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/7d7ccc9ec501a5d8c9143b2e1bcc11cb",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/kamailio/kamailio/issues/4954",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/kamailio/kamailio/pull/4958",
      "source": "[email protected]"
    }
  ]
}