Linux Distros Unpatched Vulnerability : CVE-2026-52860

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

include('compat.inc');

if (description)
{
  script_id(320659);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/12");

  script_cve_id("CVE-2026-52860");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-52860");

  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.

  - Vim is an open source, command line text editor. Prior to version 9.2.0597, Vim's Python omni-completion
    executes reconstructed function and class definitions from the current buffer with exec() as part of
    populating the completion dictionary. Python evaluates function default values, parameter annotations, and
    class base expressions at definition time, so a hostile buffer can execute attacker-controlled Python
    expressions during omni-completion. The existing g:pythoncomplete_allow_import mitigation (GHSA-52mc-
    rq6p-rc7c) does not cover this path, because the attacker-controlled code is not a harvested import/from
    statement. This issue has been patched in version 9.2.0597. (CVE-2026-52860)

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-2026-52860");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-52860");
  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:L/AC:M/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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:A/VC:H/VI:H/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-2026-52860");

  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:"2026/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  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:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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:canonical:ubuntu_linux:vim");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:vim");
  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-11", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14", "Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.10", "Host/OS/Ubuntu Linux-26.04");

  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 = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-motif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-dbg"},
          {"reference": "vim-doc"},
          {"reference": "vim-gnome"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-lesstif"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-athena-py2"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gnome"},
          {"reference": "vim-gnome-py2"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gtk-py2"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gtk3-py2"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-nox"},
          {"reference": "vim-nox-py2"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "vim"},
          {"reference": "vim-athena"},
          {"reference": "vim-common"},
          {"reference": "vim-doc"},
          {"reference": "vim-gnome"},
          {"reference": "vim-gtk"},
          {"reference": "vim-gtk3"},
          {"reference": "vim-gui-common"},
          {"reference": "vim-nox"},
          {"reference": "vim-runtime"},
          {"reference": "vim-tiny"},
          {"reference": "xxd"}
        ]
      }
    ]
  }
};

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');
}