Linux Distros Unpatched Vulnerability : CVE-2026-15588

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

include('compat.inc');

if (description)
{
  script_id(327997);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/20");

  script_cve_id("CVE-2026-15588");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-15588");

  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 denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The
    `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a
    client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending
    excessively long streams of data, causing the application to consume massive amounts of system memory and
    CPU, potentially leading to a crash or system hang. (CVE-2026-15588)

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-2026-15588");
  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:L/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:N/AC:L/PR:N/UI:N/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:"cvss_score_source", value:"CVE-2026-15588");

  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:"2026/07/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  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:centos:centos:glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:glib2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:glib2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:glib2-fam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:glib2-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:glib2-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mingw-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mingw32-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mingw32-glib2-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mingw64-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:mingw64-glib2-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2-fam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glib2-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw32-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw32-glib2-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw64-glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw64-glib2-static");
  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/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-6", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9");

  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/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": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"},
          {"reference": "mingw-glib2"},
          {"reference": "mingw32-glib2"},
          {"reference": "mingw32-glib2-static"},
          {"reference": "mingw64-glib2"},
          {"reference": "mingw64-glib2-static"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"},
          {"reference": "mingw-glib2"},
          {"reference": "mingw32-glib2"},
          {"reference": "mingw32-glib2-static"},
          {"reference": "mingw64-glib2"},
          {"reference": "mingw64-glib2-static"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-static"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-fam"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-fam"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-fam"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"},
          {"reference": "mingw-glib2"},
          {"reference": "mingw32-glib2"},
          {"reference": "mingw32-glib2-static"},
          {"reference": "mingw64-glib2"},
          {"reference": "mingw64-glib2-static"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "glib2"},
          {"reference": "glib2-devel"},
          {"reference": "glib2-doc"},
          {"reference": "glib2-fam"},
          {"reference": "glib2-static"},
          {"reference": "glib2-tests"},
          {"reference": "mingw-glib2"},
          {"reference": "mingw32-glib2"},
          {"reference": "mingw32-glib2-static"},
          {"reference": "mingw64-glib2"},
          {"reference": "mingw64-glib2-static"}
        ]
      }
    ]
  }
};

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');
}