Linux Distros Unpatched Vulnerability : CVE-2026-24708

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

include('compat.inc');

if (description)
{
  script_id(299348);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/23");

  script_cve_id("CVE-2026-24708");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-24708");

  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.

  - An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By
    writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may
    convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in an unsafe
    image resize operation that could destroy data on the host system. Only compute nodes using the Flat image
    backend (usually configured with use_cow_images=False) are affected. (CVE-2026-24708)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-24708");
  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:P/I:P/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:H/PR:L/UI:N/S:C/C:N/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-2026-24708");

  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:"plugin_publication_date", value:"2026/02/18");

  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:"p-cpe:/a:canonical:ubuntu_linux:nova");
  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/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04");

  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/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "nova-ajax-console-proxy"},
          {"reference": "nova-api"},
          {"reference": "nova-api-metadata"},
          {"reference": "nova-api-os-compute"},
          {"reference": "nova-api-os-volume"},
          {"reference": "nova-cells"},
          {"reference": "nova-cert"},
          {"reference": "nova-common"},
          {"reference": "nova-compute"},
          {"reference": "nova-compute-kvm"},
          {"reference": "nova-compute-libvirt"},
          {"reference": "nova-compute-lxc"},
          {"reference": "nova-compute-qemu"},
          {"reference": "nova-compute-vmware"},
          {"reference": "nova-compute-xen"},
          {"reference": "nova-conductor"},
          {"reference": "nova-console"},
          {"reference": "nova-consoleauth"},
          {"reference": "nova-doc"},
          {"reference": "nova-network"},
          {"reference": "nova-novncproxy"},
          {"reference": "nova-scheduler"},
          {"reference": "nova-serialproxy"},
          {"reference": "nova-spiceproxy"},
          {"reference": "nova-volume"},
          {"reference": "nova-xvpvncproxy"},
          {"reference": "python-nova"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "nova-ajax-console-proxy"},
          {"reference": "nova-api"},
          {"reference": "nova-api-metadata"},
          {"reference": "nova-api-os-compute"},
          {"reference": "nova-api-os-volume"},
          {"reference": "nova-cells"},
          {"reference": "nova-common"},
          {"reference": "nova-compute"},
          {"reference": "nova-compute-kvm"},
          {"reference": "nova-compute-libvirt"},
          {"reference": "nova-compute-lxc"},
          {"reference": "nova-compute-qemu"},
          {"reference": "nova-compute-vmware"},
          {"reference": "nova-compute-xen"},
          {"reference": "nova-conductor"},
          {"reference": "nova-console"},
          {"reference": "nova-consoleauth"},
          {"reference": "nova-doc"},
          {"reference": "nova-network"},
          {"reference": "nova-novncproxy"},
          {"reference": "nova-placement-api"},
          {"reference": "nova-scheduler"},
          {"reference": "nova-serialproxy"},
          {"reference": "nova-spiceproxy"},
          {"reference": "nova-volume"},
          {"reference": "nova-xvpvncproxy"},
          {"reference": "python-nova"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "nova-ajax-console-proxy"},
          {"reference": "nova-api"},
          {"reference": "nova-api-metadata"},
          {"reference": "nova-api-os-compute"},
          {"reference": "nova-api-os-volume"},
          {"reference": "nova-cells"},
          {"reference": "nova-common"},
          {"reference": "nova-compute"},
          {"reference": "nova-compute-kvm"},
          {"reference": "nova-compute-libvirt"},
          {"reference": "nova-compute-lxc"},
          {"reference": "nova-compute-qemu"},
          {"reference": "nova-compute-vmware"},
          {"reference": "nova-compute-xen"},
          {"reference": "nova-conductor"},
          {"reference": "nova-doc"},
          {"reference": "nova-novncproxy"},
          {"reference": "nova-scheduler"},
          {"reference": "nova-serialproxy"},
          {"reference": "nova-spiceproxy"},
          {"reference": "nova-volume"},
          {"reference": "python3-nova"}
        ]
      }
    ]
  }
};

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