Linux Distros Unpatched Vulnerability : CVE-2026-120754

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

include('compat.inc');

if (description)
{
  script_id(376187);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/06");

  script_cve_id("CVE-2026-120754");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-120754");

  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.

  - HDF5 through 2.2.0 contains an uninitialized memory read vulnerability in H5Z__filter_scaleoffset() in
    src/H5Zscaleoffset.c. The decode path validates reads against the allocated size of the chunk buffer
    rather than the number of bytes actually read from the file. Because H5D__chunk_lock() deliberately sizes
    filtered chunk buffers to the larger of the stored and unfiltered chunk sizes and fills only the stored
    bytes, a truncated chunk passes these bounds checks and is decompressed from the uninitialized remainder
    of the allocation. Unrelated heap contents are then returned to the caller as dataset data. Because the
    reads remain within the allocation, the issue is not detected by AddressSanitizer. An attacker who can get
    a user or application to read a dataset from a crafted HDF5 file can cause disclosure of process memory.
    This issue exists because of an incomplete fix for CVE-2026-19029. (CVE-2026-120754)

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-2026-120754");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-120754");
  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: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:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N");
  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:N/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-120754");

  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:"2026/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/11/04");

  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:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.10");
  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:hdf5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:hdf5");
  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-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-26.04", "Host/OS/Ubuntu Linux-26.10");

  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": "hdf5-helpers"},
          {"reference": "hdf5-tools"},
          {"reference": "libhdf5-103"},
          {"reference": "libhdf5-103-1"},
          {"reference": "libhdf5-cpp-103"},
          {"reference": "libhdf5-cpp-103-1"},
          {"reference": "libhdf5-dev"},
          {"reference": "libhdf5-doc"},
          {"reference": "libhdf5-fortran-102"},
          {"reference": "libhdf5-hl-100"},
          {"reference": "libhdf5-hl-cpp-100"},
          {"reference": "libhdf5-hl-fortran-100"},
          {"reference": "libhdf5-java"},
          {"reference": "libhdf5-jni"},
          {"reference": "libhdf5-mpi-dev"},
          {"reference": "libhdf5-mpich-103"},
          {"reference": "libhdf5-mpich-103-1"},
          {"reference": "libhdf5-mpich-cpp-103-1"},
          {"reference": "libhdf5-mpich-dev"},
          {"reference": "libhdf5-mpich-fortran-102"},
          {"reference": "libhdf5-mpich-hl-100"},
          {"reference": "libhdf5-mpich-hl-cpp-100"},
          {"reference": "libhdf5-mpich-hl-fortran-100"},
          {"reference": "libhdf5-openmpi-103"},
          {"reference": "libhdf5-openmpi-103-1"},
          {"reference": "libhdf5-openmpi-cpp-103-1"},
          {"reference": "libhdf5-openmpi-dev"},
          {"reference": "libhdf5-openmpi-fortran-102"},
          {"reference": "libhdf5-openmpi-hl-100"},
          {"reference": "libhdf5-openmpi-hl-cpp-100"},
          {"reference": "libhdf5-openmpi-hl-fortran-100"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "hdf5-helpers"},
          {"reference": "hdf5-tools"},
          {"reference": "libhdf5-320"},
          {"reference": "libhdf5-cpp-320"},
          {"reference": "libhdf5-dev"},
          {"reference": "libhdf5-doc"},
          {"reference": "libhdf5-fortran-320"},
          {"reference": "libhdf5-hl-320"},
          {"reference": "libhdf5-hl-cpp-320"},
          {"reference": "libhdf5-hl-fortran-320"},
          {"reference": "libhdf5-java"},
          {"reference": "libhdf5-jni"},
          {"reference": "libhdf5-mpi-dev"},
          {"reference": "libhdf5-mpich-320"},
          {"reference": "libhdf5-mpich-cpp-320"},
          {"reference": "libhdf5-mpich-dev"},
          {"reference": "libhdf5-mpich-fortran-320"},
          {"reference": "libhdf5-mpich-hl-320"},
          {"reference": "libhdf5-mpich-hl-cpp-320"},
          {"reference": "libhdf5-mpich-hl-fortran-320"},
          {"reference": "libhdf5-openmpi-320"},
          {"reference": "libhdf5-openmpi-cpp-320"},
          {"reference": "libhdf5-openmpi-dev"},
          {"reference": "libhdf5-openmpi-fortran-320"},
          {"reference": "libhdf5-openmpi-hl-320"},
          {"reference": "libhdf5-openmpi-hl-cpp-320"},
          {"reference": "libhdf5-openmpi-hl-fortran-320"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "hdf5-helpers"},
          {"reference": "hdf5-tools"},
          {"reference": "libhdf5-310"},
          {"reference": "libhdf5-cpp-310"},
          {"reference": "libhdf5-dev"},
          {"reference": "libhdf5-doc"},
          {"reference": "libhdf5-fortran-310"},
          {"reference": "libhdf5-hl-310"},
          {"reference": "libhdf5-hl-cpp-310"},
          {"reference": "libhdf5-hl-fortran-310"},
          {"reference": "libhdf5-java"},
          {"reference": "libhdf5-jni"},
          {"reference": "libhdf5-mpi-dev"},
          {"reference": "libhdf5-mpich-310"},
          {"reference": "libhdf5-mpich-cpp-310"},
          {"reference": "libhdf5-mpich-dev"},
          {"reference": "libhdf5-mpich-fortran-310"},
          {"reference": "libhdf5-mpich-hl-310"},
          {"reference": "libhdf5-mpich-hl-cpp-310"},
          {"reference": "libhdf5-mpich-hl-fortran-310"},
          {"reference": "libhdf5-openmpi-310"},
          {"reference": "libhdf5-openmpi-cpp-310"},
          {"reference": "libhdf5-openmpi-dev"},
          {"reference": "libhdf5-openmpi-fortran-310"},
          {"reference": "libhdf5-openmpi-hl-310"},
          {"reference": "libhdf5-openmpi-hl-cpp-310"},
          {"reference": "libhdf5-openmpi-hl-fortran-310"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.10",
        "pkgs": [
          {"reference": "hdf5"}
        ]
      }
    ]
  }
};

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