Linux Distros Unpatched Vulnerability : CVE-2026-6210

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

include('compat.inc');

if (description)
{
  script_id(313291);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/30");

  script_cve_id("CVE-2026-6210");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-6210");

  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.

  - A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted
    SVG image. When processing SVG marker references, the renderer retrieves a node by its id attribute and
    casts it to QSvgMarker* without verifying the node type. A non-marker element (such as a <line> element)
    that references itself as a marker triggers an out-of-bounds heap read due to the object size difference
    between QSvgLine and QSvgMarker, followed by an endless recursion that bypasses the marker recursion guard
    through incorrect virtual dispatch. The result is an application crash (denial of service). This issue
    affects Qt SVG: from 6.7.0 before 6.8.8, from 6.9.0 before 6.11.1. (CVE-2026-6210)

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-2026-6210");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-6210");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-6210");
  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:N/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:L/AC:L/PR:N/UI:R/S:U/C:N/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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-6210");

  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:"2026/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:qt5-qtsvg-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:qt5-qtsvg-doc");
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  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");
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  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": "libqt5svg5"},
          {"reference": "libqt5svg5-dev"},
          {"reference": "libqt6svg6"},
          {"reference": "libqt6svgwidgets6"},
          {"reference": "qt6-svg-dev"},
          {"reference": "qtsvg5-doc"},
          {"reference": "qtsvg5-doc-html"},
          {"reference": "qtsvg5-examples"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libqt5svg5"},
          {"reference": "libqt5svg5-dev"},
          {"reference": "libqt6svg6"},
          {"reference": "libqt6svgwidgets6"},
          {"reference": "qt6-svg-dev"},
          {"reference": "qt6-svg-doc"},
          {"reference": "qt6-svg-doc-dev"},
          {"reference": "qt6-svg-doc-html"},
          {"reference": "qt6-svg-plugins"},
          {"reference": "qt6-svg-private-dev"},
          {"reference": "qtsvg5-doc"},
          {"reference": "qtsvg5-doc-html"},
          {"reference": "qtsvg5-examples"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "libqt5svg5"},
          {"reference": "libqt5svg5-dev"},
          {"reference": "qtsvg5-doc"},
          {"reference": "qtsvg5-doc-html"},
          {"reference": "qtsvg5-examples"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "libqt5svg5"},
          {"reference": "libqt5svg5-dev"},
          {"reference": "qtsvg5-doc"},
          {"reference": "qtsvg5-doc-html"},
          {"reference": "qtsvg5-examples"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "qt6-svg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "qt6-svg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "qt6-svg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "qt6-svg"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "qt6-qtsvg"},
          {"reference": "qt6-qtsvg-devel"},
          {"reference": "qt6-qtsvg-examples"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "qt5-qtsvg"},
          {"reference": "qt5-qtsvg-devel"},
          {"reference": "qt5-qtsvg-doc"},
          {"reference": "qt5-qtsvg-examples"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "qt5-qtsvg"},
          {"reference": "qt5-qtsvg-devel"},
          {"reference": "qt5-qtsvg-doc"},
          {"reference": "qt5-qtsvg-examples"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "qt5-qtsvg"},
          {"reference": "qt5-qtsvg-devel"},
          {"reference": "qt5-qtsvg-examples"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "qt5-qtsvg"},
          {"reference": "qt5-qtsvg-devel"},
          {"reference": "qt5-qtsvg-examples"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "qt5-qtsvg"},
          {"reference": "qt5-qtsvg-devel"},
          {"reference": "qt5-qtsvg-examples"}
        ]
      }
    ]
  }
};

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 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');
}