Linux Distros Unpatched Vulnerability : CVE-2026-76151

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

include('compat.inc');

if (description)
{
  script_id(348709);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/22");

  script_cve_id("CVE-2026-76151");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-76151");

  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.

  - Out-of-bounds read (buffer over-read) in the HTTP Cache-Control response header parsing in the QtNetwork
    module in Qt Group Qt 6.0.0 through 6.8.8, and 6.9.0 through 6.11.1, allows remote attackers to cause a
    denial of service (application crash) via an excessively large Cache-Control header value returned by an
    untrusted or compromised HTTP server to an application using QNetworkAccessManager. Only the client side
    of the connection is affected and 32-bit builds are not affected; the out-of-bounds access is read-only,
    with no information disclosure and no code execution. (CVE-2026-76151)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-76151");
  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:N/AC:M/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/AU:N/R:A");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-76151");

  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:"2026/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qt6-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qtbase-opensource-src");
  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/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14");

  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/Debian/dpkg-l"))) 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": "libqt5concurrent5"},
          {"reference": "libqt5core5a"},
          {"reference": "libqt5dbus5"},
          {"reference": "libqt5gui5"},
          {"reference": "libqt5network5"},
          {"reference": "libqt5opengl5"},
          {"reference": "libqt5opengl5-dev"},
          {"reference": "libqt5printsupport5"},
          {"reference": "libqt5sql5"},
          {"reference": "libqt5sql5-ibase"},
          {"reference": "libqt5sql5-mysql"},
          {"reference": "libqt5sql5-odbc"},
          {"reference": "libqt5sql5-psql"},
          {"reference": "libqt5sql5-sqlite"},
          {"reference": "libqt5sql5-tds"},
          {"reference": "libqt5test5"},
          {"reference": "libqt5widgets5"},
          {"reference": "libqt5xml5"},
          {"reference": "libqt6concurrent6"},
          {"reference": "libqt6core6"},
          {"reference": "libqt6dbus6"},
          {"reference": "libqt6gui6"},
          {"reference": "libqt6network6"},
          {"reference": "libqt6opengl6"},
          {"reference": "libqt6opengl6-dev"},
          {"reference": "libqt6openglwidgets6"},
          {"reference": "libqt6printsupport6"},
          {"reference": "libqt6sql6"},
          {"reference": "libqt6sql6-ibase"},
          {"reference": "libqt6sql6-mysql"},
          {"reference": "libqt6sql6-odbc"},
          {"reference": "libqt6sql6-psql"},
          {"reference": "libqt6sql6-sqlite"},
          {"reference": "libqt6test6"},
          {"reference": "libqt6widgets6"},
          {"reference": "libqt6xml6"},
          {"reference": "qmake6"},
          {"reference": "qmake6-bin"},
          {"reference": "qt5-flatpak-platformtheme"},
          {"reference": "qt5-gtk-platformtheme"},
          {"reference": "qt5-qmake"},
          {"reference": "qt5-qmake-bin"},
          {"reference": "qt5-xdgdesktopportal-platformtheme"},
          {"reference": "qt6-base-dev"},
          {"reference": "qt6-base-dev-tools"},
          {"reference": "qt6-base-private-dev"},
          {"reference": "qt6-gtk-platformtheme"},
          {"reference": "qt6-qpa-plugins"},
          {"reference": "qt6-xdgdesktopportal-platformtheme"},
          {"reference": "qtbase5-dev"},
          {"reference": "qtbase5-dev-tools"},
          {"reference": "qtbase5-doc"},
          {"reference": "qtbase5-doc-dev"},
          {"reference": "qtbase5-doc-html"},
          {"reference": "qtbase5-examples"},
          {"reference": "qtbase5-private-dev"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "libqt5concurrent5t64"},
          {"reference": "libqt5core5t64"},
          {"reference": "libqt5dbus5t64"},
          {"reference": "libqt5gui5t64"},
          {"reference": "libqt5network5t64"},
          {"reference": "libqt5opengl5-dev"},
          {"reference": "libqt5opengl5t64"},
          {"reference": "libqt5printsupport5t64"},
          {"reference": "libqt5sql5-ibase"},
          {"reference": "libqt5sql5-mysql"},
          {"reference": "libqt5sql5-odbc"},
          {"reference": "libqt5sql5-psql"},
          {"reference": "libqt5sql5-sqlite"},
          {"reference": "libqt5sql5-tds"},
          {"reference": "libqt5sql5t64"},
          {"reference": "libqt5test5t64"},
          {"reference": "libqt5widgets5t64"},
          {"reference": "libqt5xml5t64"},
          {"reference": "libqt6concurrent6"},
          {"reference": "libqt6core6t64"},
          {"reference": "libqt6dbus6"},
          {"reference": "libqt6gui6"},
          {"reference": "libqt6network6"},
          {"reference": "libqt6opengl6"},
          {"reference": "libqt6openglwidgets6"},
          {"reference": "libqt6printsupport6"},
          {"reference": "libqt6sql6"},
          {"reference": "libqt6sql6-ibase"},
          {"reference": "libqt6sql6-mysql"},
          {"reference": "libqt6sql6-odbc"},
          {"reference": "libqt6sql6-psql"},
          {"reference": "libqt6sql6-sqlite"},
          {"reference": "libqt6test6"},
          {"reference": "libqt6waylandclient6"},
          {"reference": "libqt6widgets6"},
          {"reference": "libqt6wlshellintegration6"},
          {"reference": "libqt6xml6"},
          {"reference": "qmake6"},
          {"reference": "qmake6-bin"},
          {"reference": "qt5-gtk-platformtheme"},
          {"reference": "qt5-qmake"},
          {"reference": "qt5-qmake-bin"},
          {"reference": "qt5-xdgdesktopportal-platformtheme"},
          {"reference": "qt6-base-dev"},
          {"reference": "qt6-base-dev-tools"},
          {"reference": "qt6-base-doc"},
          {"reference": "qt6-base-doc-dev"},
          {"reference": "qt6-base-doc-html"},
          {"reference": "qt6-base-examples"},
          {"reference": "qt6-base-private-dev"},
          {"reference": "qt6-gtk-platformtheme"},
          {"reference": "qt6-qpa-plugins"},
          {"reference": "qt6-xdgdesktopportal-platformtheme"},
          {"reference": "qtbase5-dev"},
          {"reference": "qtbase5-dev-tools"},
          {"reference": "qtbase5-doc"},
          {"reference": "qtbase5-doc-dev"},
          {"reference": "qtbase5-doc-html"},
          {"reference": "qtbase5-examples"},
          {"reference": "qtbase5-private-dev"},
          {"reference": "qtpaths6"},
          {"reference": "qtpaths6-bin"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libqt5concurrent5t64"},
          {"reference": "libqt5core5t64"},
          {"reference": "libqt5dbus5t64"},
          {"reference": "libqt5gui5t64"},
          {"reference": "libqt5network5t64"},
          {"reference": "libqt5opengl5-dev"},
          {"reference": "libqt5opengl5t64"},
          {"reference": "libqt5printsupport5t64"},
          {"reference": "libqt5sql5-ibase"},
          {"reference": "libqt5sql5-mysql"},
          {"reference": "libqt5sql5-odbc"},
          {"reference": "libqt5sql5-psql"},
          {"reference": "libqt5sql5-sqlite"},
          {"reference": "libqt5sql5-tds"},
          {"reference": "libqt5sql5t64"},
          {"reference": "libqt5test5t64"},
          {"reference": "libqt5widgets5t64"},
          {"reference": "libqt5xml5t64"},
          {"reference": "libqt6concurrent6"},
          {"reference": "libqt6core6t64"},
          {"reference": "libqt6dbus6"},
          {"reference": "libqt6gui6"},
          {"reference": "libqt6network6"},
          {"reference": "libqt6opengl6"},
          {"reference": "libqt6openglwidgets6"},
          {"reference": "libqt6printsupport6"},
          {"reference": "libqt6sql6"},
          {"reference": "libqt6sql6-ibase"},
          {"reference": "libqt6sql6-mysql"},
          {"reference": "libqt6sql6-odbc"},
          {"reference": "libqt6sql6-psql"},
          {"reference": "libqt6sql6-sqlite"},
          {"reference": "libqt6test6"},
          {"reference": "libqt6widgets6"},
          {"reference": "libqt6xml6"},
          {"reference": "qmake6"},
          {"reference": "qmake6-bin"},
          {"reference": "qt5-gtk-platformtheme"},
          {"reference": "qt5-qmake"},
          {"reference": "qt5-qmake-bin"},
          {"reference": "qt5-xdgdesktopportal-platformtheme"},
          {"reference": "qt6-base-dev"},
          {"reference": "qt6-base-dev-tools"},
          {"reference": "qt6-base-doc"},
          {"reference": "qt6-base-doc-dev"},
          {"reference": "qt6-base-doc-html"},
          {"reference": "qt6-base-examples"},
          {"reference": "qt6-base-private-dev"},
          {"reference": "qt6-gtk-platformtheme"},
          {"reference": "qt6-qpa-plugins"},
          {"reference": "qt6-xdgdesktopportal-platformtheme"},
          {"reference": "qtbase5-dev"},
          {"reference": "qtbase5-dev-tools"},
          {"reference": "qtbase5-doc"},
          {"reference": "qtbase5-doc-dev"},
          {"reference": "qtbase5-doc-html"},
          {"reference": "qtbase5-examples"},
          {"reference": "qtbase5-private-dev"}
        ]
      }
    ]
  }
};

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_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}