Linux Distros Unpatched Vulnerability : CVE-2026-110095

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

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  script_cve_id("CVE-2026-110095");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-110095");

  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.

  - fast-uri is a dependency-free RFC 3986 URI parser and serializer for Node.js. In versions before 2.4.8,
    from 3.0.0 through 3.1.8, and from 4.0.0 through 4.2.2, the normalize() and serialize() functions apply
    RFC 3986 dot-segment removal to the path of a relative-path reference, even though that algorithm is
    defined only for the merged target path during resolution, so a leading parent-directory segment can be
    dropped and a document-relative reference can become root-relative. An application that normalizes an
    attacker-supplied or user-supplied relative reference and then resolves it, or uses it as a cache,
    deduplication, or authorization key, can have the reference escape its intended directory and point at a
    different resource. The issue is fixed in fast-uri 2.4.8, 3.1.9, and 4.2.3, and users should upgrade to
    one of these versions or later. As a workaround, resolve a relative reference against its absolute base
    first and normalize the absolute result instead of normalizing the reference beforehand. (CVE-2026-110095)

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-2026-110095");
  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-110095");

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  script_set_attribute(attribute:"exploit_available", value:"false");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/20");

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  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
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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/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "aspnetcore-runtime-8.0"},
          {"reference": "aspnetcore-runtime-dbg-8.0"},
          {"reference": "aspnetcore-targeting-pack-8.0"},
          {"reference": "cockpit-image-builder"},
          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-runtime-8.0"},
          {"reference": "dotnet-runtime-dbg-8.0"},
          {"reference": "dotnet-sdk-8.0"},
          {"reference": "dotnet-sdk-8.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-dbg-8.0"},
          {"reference": "dotnet-targeting-pack-8.0"},
          {"reference": "dotnet-templates-8.0"},
          {"reference": "dotnet8.0"},
          {"reference": "grafana"},
          {"reference": "grafana-pcp"},
          {"reference": "grafana-selinux"},
          {"reference": "linux-sgx"},
          {"reference": "sgx-common"},
          {"reference": "sgx-libs"},
          {"reference": "sgx-mpa"},
          {"reference": "sgx-pccs"},
          {"reference": "sgx-pccs-admin"},
          {"reference": "sgx-pckid-tool"},
          {"reference": "tdx-qgs"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "aspnetcore-runtime-8.0"},
          {"reference": "aspnetcore-runtime-dbg-8.0"},
          {"reference": "aspnetcore-targeting-pack-8.0"},
          {"reference": "dotnet"},
          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-runtime-8.0"},
          {"reference": "dotnet-runtime-dbg-8.0"},
          {"reference": "dotnet-sdk-8.0"},
          {"reference": "dotnet-sdk-8.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-dbg-8.0"},
          {"reference": "dotnet-targeting-pack-8.0"},
          {"reference": "dotnet-templates-8.0"},
          {"reference": "dotnet8.0"},
          {"reference": "netstandard-targeting-pack-2.1"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "aspnetcore-runtime-8.0"},
          {"reference": "aspnetcore-runtime-dbg-8.0"},
          {"reference": "aspnetcore-targeting-pack-8.0"},
          {"reference": "dotnet"},
          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-runtime-8.0"},
          {"reference": "dotnet-runtime-dbg-8.0"},
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    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "aspnetcore-runtime-8.0"},
          {"reference": "aspnetcore-runtime-dbg-8.0"},
          {"reference": "aspnetcore-targeting-pack-8.0"},
          {"reference": "dotnet-apphost-pack-8.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-8.0"},
          {"reference": "dotnet-runtime-8.0"},
          {"reference": "dotnet-runtime-dbg-8.0"},
          {"reference": "dotnet-sdk-8.0"},
          {"reference": "dotnet-sdk-8.0-source-built-artifacts"},
          {"reference": "dotnet-sdk-dbg-8.0"},
          {"reference": "dotnet-targeting-pack-8.0"},
          {"reference": "dotnet-templates-8.0"},
          {"reference": "dotnet8.0"},
          {"reference": "linux-sgx"},
          {"reference": "netstandard-targeting-pack-2.1"},
          {"reference": "sgx-common"},
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          {"reference": "sgx-pccs"},
          {"reference": "sgx-pccs-admin"},
          {"reference": "sgx-pckid-tool"},
          {"reference": "tdx-qgs"}
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      }
    ]
  }
};

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');
}