CVE-2026-106803

    Dashboard / Vulnerabilities / CVE-2026-106803

    CVE-2026-106803

    Published: 2 Nov 2026Last Modified: 5 Nov 2026

    Summary:

    Details: 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.

    References: https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106803.json, https://nvd.nist.gov/vuln/detail/CVE-2026-106803, https://github.com/kamailio/kamailio/issues/4954, https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9, https://github.com/kamailio/kamailio/pull/4958

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -21261436492f0014930e804e20586e3833bb91b9

    Affected versions

    sr_3.1_freeze

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-106803 | CVE-DB