Linux Distros Unpatched Vulnerability : CVE-2026-19774

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

include('compat.inc');

if (description)
{
  script_id(345981);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/16");

  script_cve_id("CVE-2026-19774");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-19774");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows
    network-adjacent attackers to execute arbitrary code on affected installations of BlueZ. An attacker must
    first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit
    this vulnerability. The specific flaw exists within the handling of the stream endpoints. The issue
    results from the lack of proper validation of the length of user-supplied data prior to copying it to a
    fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the
    context of root. Was ZDI-CAN-29429. (CVE-2026-19774)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-19774");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-19774");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-19774");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-19774");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez-cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez-hid2hci");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:bluez-obexd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez-cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez-hid2hci");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bluez-obexd");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-26.04");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-meshd"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-source"},
          {"reference": "bluez-test-scripts"},
          {"reference": "bluez-test-tools"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-meshd"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-source"},
          {"reference": "bluez-test-scripts"},
          {"reference": "bluez-test-tools"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-meshd"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-source"},
          {"reference": "bluez-test-scripts"},
          {"reference": "bluez-test-tools"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-meshd"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-source"},
          {"reference": "bluez-test-scripts"},
          {"reference": "bluez-test-tools"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-dbg"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-tests"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"},
          {"reference": "libbluetooth3-dbg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-dbg"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-tests"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"},
          {"reference": "libbluetooth3-dbg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-dbg"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-tests"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"},
          {"reference": "libbluetooth3-dbg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "bluetooth"},
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hcidump"},
          {"reference": "bluez-meshd"},
          {"reference": "bluez-obexd"},
          {"reference": "bluez-tests"},
          {"reference": "libbluetooth-dev"},
          {"reference": "libbluetooth3"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"},
          {"reference": "bluez-obexd"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"},
          {"reference": "bluez-obexd"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hid2hci"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hid2hci"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hid2hci"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"},
          {"reference": "bluez-obexd"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "bluez"},
          {"reference": "bluez-cups"},
          {"reference": "bluez-hid2hci"},
          {"reference": "bluez-libs"},
          {"reference": "bluez-libs-devel"},
          {"reference": "bluez-obexd"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
    var third_party_vendors = distro_constraints_values['third_party'];
    if (!empty_or_null(third_party_vendors)) {
        var vendor;
        foreach vendor (third_party_vendors) {
            if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
        }
    }
}

var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}