Docker Desktop < 4.76.0 VM Panic via Unbounded Recursion (CVE-2026-8936)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(318782);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/08");

  script_cve_id("CVE-2026-8936");
  script_xref(name:"IAVA", value:"2026-A-0542");

  script_name(english:"Docker Desktop < 4.76.0 VM Panic via Unbounded Recursion (CVE-2026-8936)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application installed that is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Docker Desktop installed on the remote host is prior to 4.76.0. It is, therefore, affected by a
denial of service vulnerability:

  - A VM panic caused by unbounded recursion in the grpcfuse kernel module when a container created deeply nested
    directories on a bind-mounted host folder and triggered a dentry invalidation event. (CVE-2026-8936)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://docs.docker.com/desktop/release-notes/#4760");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Docker Desktop version 4.76.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/R:U");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-8936");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:docker:docker");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("docker_for_linux_installed.nbin", "docker_for_mac_installed.nbin", "docker_for_windows_installed.nbin");
  script_require_ports("installed_sw/Docker Desktop", "installed_sw/Docker", "installed_sw/Docker for Windows");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'checks': [
    {
      'product': {'name': 'Docker for Windows', 'type': 'app'},
      'check_algorithm': 'default',
      'requires': [
        {'scope': 'target', 'match': {'os': 'windows'}}
      ],
      'constraints': [{'fixed_version': '4.76.0'}]
    },
    {
      'product': {'name': 'Docker', 'type': 'app'},
      'check_algorithm': 'default',
      'requires': [
        {'scope': 'target', 'match': {'os': 'macos'}}
      ],
      'constraints': [{'fixed_version': '4.76.0'}]
    },
    {
      'product': {'name': 'Docker Desktop', 'type': 'app'},
      'check_algorithm': 'default',
      'requires': [
        {'scope': 'target', 'match': {'os': 'linux'}}
      ],
      'constraints': [{'fixed_version': '4.76.0'}]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:result);