Linux Distros Unpatched Vulnerability : CVE-2026-51303

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

include('compat.inc');

if (description)
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  script_cve_id("CVE-2026-51303");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-51303");

  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 use-after-free (UAF) vulnerability was discovered in the core parsing component of SQLite 3.41. The flaw
    occurs because the program frees an ExprList object via sqlite3ExprListDelete and then subsequently
    accesses the dangling pointer of the released object. A remote adversary can supply specially crafted SQL
    queries to trigger this vulnerability during SQL statement parsing. Successful exploitation may result in
    application crash (denial of service), sensitive memory information leakage, and in some scenarios,
    arbitrary code execution on the affected host. (CVE-2026-51303)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"agent", value:"unix");
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  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:H/I:H/A:H");
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  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:"2026/07/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/28");

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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/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-0-dbg"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-0-dbg"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"},
          {"reference": "sqlite3-tools"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"},
          {"reference": "sqlite3-tools"}
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      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
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        "release": "26.04",
        "pkgs": [
          {"reference": "lemon"},
          {"reference": "libsqlite3-0"},
          {"reference": "libsqlite3-dev"},
          {"reference": "libsqlite3-ext-csv"},
          {"reference": "libsqlite3-ext-icu"},
          {"reference": "libsqlite3-tcl"},
          {"reference": "sqlite3"},
          {"reference": "sqlite3-doc"},
          {"reference": "sqlite3-tools"}
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      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "sqlite"},
          {"reference": "sqlite-devel"},
          {"reference": "sqlite-libs"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "clippy"},
          {"reference": "lemon"},
          {"reference": "mingw-sqlite"},
          {"reference": "mingw32-sqlite"},
          {"reference": "mingw32-sqlite-static"},
          {"reference": "mingw64-sqlite"},
          {"reference": "mingw64-sqlite-static"},
          {"reference": "nodejs"},
          {"reference": "nodejs-devel"},
          {"reference": "nodejs-docs"},
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          {"reference": "npm"},
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          {"reference": "rust-debugger-common"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rust-std-static"},
          {"reference": "rust-std-static-wasm32-unknown-unknown"},
          {"reference": "rust-std-static-wasm32-wasi"},
          {"reference": "rust-toolset"},
          {"reference": "rustfmt"},
          {"reference": "sqlite"},
          {"reference": "sqlite-devel"},
          {"reference": "sqlite-doc"},
          {"reference": "sqlite-libs"},
          {"reference": "v8-12.4-devel"},
          {"reference": "v8-13.6-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "clippy"},
          {"reference": "lemon"},
          {"reference": "mingw-sqlite"},
          {"reference": "mingw32-sqlite"},
          {"reference": "mingw32-sqlite-static"},
          {"reference": "mingw64-sqlite"},
          {"reference": "mingw64-sqlite-static"},
          {"reference": "nodejs"},
          {"reference": "nodejs-devel"},
          {"reference": "nodejs-docs"},
          {"reference": "nodejs-full-i18n"},
          {"reference": "nodejs-libs"},
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          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
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          {"reference": "rust-src"},
          {"reference": "rust-std-static"},
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          {"reference": "rust-toolset"},
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          {"reference": "sqlite-devel"},
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          {"reference": "v8-12.4-devel"},
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    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "clippy"},
          {"reference": "nodejs"},
          {"reference": "nodejs-docs"},
          {"reference": "nodejs-full-i18n"},
          {"reference": "nodejs-libs"},
          {"reference": "npm"},
          {"reference": "rust"},
          {"reference": "rust-analysis"},
          {"reference": "rust-analyzer"},
          {"reference": "rust-debugger-common"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rust-std-static"},
          {"reference": "rust-std-static-wasm32-unknown-unknown"},
          {"reference": "rust-std-static-wasm32-wasi"},
          {"reference": "rust-toolset"},
          {"reference": "rustfmt"},
          {"reference": "sqlite"},
          {"reference": "sqlite-devel"},
          {"reference": "sqlite-libs"}
        ]
      }
    ]
  }
};

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');
}