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Linux Distros Unpatched Vulnerability : CVE-2026-6040

🗓️ 15 Jun 2026 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 3 Views

Unpatched Linux CVE-2026-6040: heap use-after-free in ODF number format from unchecked position.

Related
Refs
Code
ReporterTitlePublishedViews
Family
CVE		CVE-2026-6040
15 Jun 202616:21
–cve
Cvelist		CVE-2026-6040 Heap use-after-free in ODF number-format blank-width parsing
15 Jun 202616:21
–cvelist
Debian		[SECURITY] [DSA 6346-1] libreoffice security update
15 Jun 202620:28
–debian
Debian CVE		CVE-2026-6040
15 Jun 202616:21
–debiancve
Tenable Nessus		Debian dsa-6346 : fonts-opensymbol - security update
15 Jun 202600:00
–nessus
EUVD		EUVD-2026-36735
15 Jun 202616:21
–euvd
NVD		CVE-2026-6040
15 Jun 202618:16
–nvd
OSV		DEBIAN-CVE-2026-6040
15 Jun 202618:16
–osv
OSV		UBUNTU-CVE-2026-6040
15 Jun 202600:00
–osv
Positive Technologies		PT-2026-49263
15 Jun 202600:00
–ptsecurity
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(321138);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/16");

  script_cve_id("CVE-2026-6040");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-6040");

  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 heap use-after-free existed when importing the blank-width characters of an ODF number format. A
    position value read from the document was not checked against the length of the format-code string, so a
    malformed number format could be processed against memory outside that string. In fixed versions the
    position is bounds-checked before use. (CVE-2026-6040)

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-2026-6040");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-6040");
  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: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:N/S:U/C:H/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:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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-2026-6040");

  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:"2026/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"p-cpe:/a:canonical:ubuntu_linux:libreoffice");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libreoffice");
  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/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-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-af"},
          {"reference": "libreoffice-l10n-am"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-nogui"},
          {"reference": "libreoffice-officebean"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-sukapura"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "libunoil-java"},
          {"reference": "python3-access2base"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-af"},
          {"reference": "libreoffice-l10n-am"},
          {"reference": "libreoffice-l10n-ar"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-officebean"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-tango"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "libunoil-java"},
          {"reference": "python3-access2base"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-af"},
          {"reference": "libreoffice-l10n-am"},
          {"reference": "libreoffice-l10n-ar"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-nogui"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-sukapura"},
          {"reference": "libreoffice-style-yaru"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "python3-access2base"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-nogui"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-sukapura"},
          {"reference": "libreoffice-style-yaru"},
          {"reference": "libreoffice-uiconfig-common"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "python3-access2base"},
          {"reference": "python3-scriptforge"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-nogui"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-sukapura"},
          {"reference": "libreoffice-style-yaru"},
          {"reference": "libreoffice-uiconfig-common"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "python3-access2base"},
          {"reference": "python3-scriptforge"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "libofficebean-java"},
          {"reference": "libreoffice"},
          {"reference": "libreoffice-base"},
          {"reference": "libreoffice-base-core"},
          {"reference": "libreoffice-base-drivers"},
          {"reference": "libreoffice-base-nogui"},
          {"reference": "libreoffice-calc"},
          {"reference": "libreoffice-calc-nogui"},
          {"reference": "libreoffice-common"},
          {"reference": "libreoffice-core"},
          {"reference": "libreoffice-core-nogui"},
          {"reference": "libreoffice-draw"},
          {"reference": "libreoffice-draw-nogui"},
          {"reference": "libreoffice-gnome"},
          {"reference": "libreoffice-help-common"},
          {"reference": "libreoffice-impress"},
          {"reference": "libreoffice-impress-nogui"},
          {"reference": "libreoffice-java-common"},
          {"reference": "libreoffice-l10n-in"},
          {"reference": "libreoffice-l10n-za"},
          {"reference": "libreoffice-math"},
          {"reference": "libreoffice-math-nogui"},
          {"reference": "libreoffice-nogui"},
          {"reference": "libreoffice-script-provider-bsh"},
          {"reference": "libreoffice-script-provider-js"},
          {"reference": "libreoffice-script-provider-python"},
          {"reference": "libreoffice-sdbc-hsqldb"},
          {"reference": "libreoffice-sdbc-mysql"},
          {"reference": "libreoffice-style-breeze"},
          {"reference": "libreoffice-style-colibre"},
          {"reference": "libreoffice-style-elementary"},
          {"reference": "libreoffice-style-karasa-jaga"},
          {"reference": "libreoffice-style-sifr"},
          {"reference": "libreoffice-style-sukapura"},
          {"reference": "libreoffice-style-yaru"},
          {"reference": "libreoffice-uiconfig-common"},
          {"reference": "libreoffice-writer"},
          {"reference": "libreoffice-writer-nogui"},
          {"reference": "python3-access2base"},
          {"reference": "python3-scriptforge"},
          {"reference": "python3-uno"}
        ]
      }
    ]
  }
};

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');
}

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16 Jun 2026 00:00Current
5.5Medium risk
Vulners AI Score5.5
CVSS 46.9
EPSS0.00117
SSVC
linux vulnerabilityunpatched vulnerabilityheap use after freeodf number formatbounds check missingno vendor patch
3