Linux Distros Unpatched Vulnerability : CVE-2026-5222

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

include('compat.inc');

if (description)
{
  script_id(316872);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/29");

  script_cve_id("CVE-2026-5222");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-5222");

  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.

  - Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse
    index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within
    the same domain, an attacker able to publish crates in a registry could obtain the credentials of others
    users of the same registry. The severity of the vulnerability is **low**, due to the extremely niche
    requirements needed to achieve the attack. (CVE-2026-5222)

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-2026-5222");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-5222");
  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:N/AC:L/PR:L/UI:N/S:U/C:H/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:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/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-2026-5222");

  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:"2026/05/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/27");

  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:cargo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.62");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.74");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.76");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.77");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.78");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.79");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.80");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.81");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.82");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.83");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.84");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.85");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.88");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.89");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.91");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.92");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rustc-1.93");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:cargo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rust-cargo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rustc");
  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": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "librust-cargo-dev"},
          {"reference": "libstd-rust-1.63"},
          {"reference": "libstd-rust-dev"},
          {"reference": "libstd-rust-dev-wasm32"},
          {"reference": "libstd-rust-dev-windows"},
          {"reference": "rust-all"},
          {"reference": "rust-clippy"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rustc"},
          {"reference": "rustfmt"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "librust-cargo+openssl-dev"},
          {"reference": "librust-cargo-dev"},
          {"reference": "libstd-rust-1.48"},
          {"reference": "libstd-rust-dev"},
          {"reference": "libstd-rust-dev-wasm32"},
          {"reference": "libstd-rust-dev-windows"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rustc"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "librust-cargo-dev"},
          {"reference": "libstd-rust-1.94"},
          {"reference": "libstd-rust-dev"},
          {"reference": "libstd-rust-dev-bpf"},
          {"reference": "libstd-rust-dev-wasm32"},
          {"reference": "libstd-rust-dev-windows"},
          {"reference": "rust-all"},
          {"reference": "rust-analyzer"},
          {"reference": "rust-clippy"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-llvm"},
          {"reference": "rust-src"},
          {"reference": "rustc"},
          {"reference": "rustfmt"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "librust-cargo-dev"},
          {"reference": "libstd-rust-1.85"},
          {"reference": "libstd-rust-dev"},
          {"reference": "libstd-rust-dev-wasm32"},
          {"reference": "libstd-rust-dev-windows"},
          {"reference": "rust-all"},
          {"reference": "rust-analyzer"},
          {"reference": "rust-clippy"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-llvm"},
          {"reference": "rust-src"},
          {"reference": "rustc"},
          {"reference": "rustfmt"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "rustc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "rustc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "rustc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "rustc"},
          {"reference": "rustc-1.76"},
          {"reference": "rustc-1.77"},
          {"reference": "rustc-1.78"},
          {"reference": "rustc-1.79"},
          {"reference": "rustc-1.80"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "libstd-rust-1.58"},
          {"reference": "libstd-rust-dev"},
          {"reference": "rust-all"},
          {"reference": "rust-clippy"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rustc"},
          {"reference": "rustc-1.62"},
          {"reference": "rustc-1.76"},
          {"reference": "rustc-1.77"},
          {"reference": "rustc-1.78"},
          {"reference": "rustc-1.79"},
          {"reference": "rustc-1.80"},
          {"reference": "rustc-1.81"},
          {"reference": "rustc-1.82"},
          {"reference": "rustc-1.83"},
          {"reference": "rustc-1.84"},
          {"reference": "rustc-1.85"},
          {"reference": "rustc-1.89"},
          {"reference": "rustc-1.91"},
          {"reference": "rustfmt"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "cargo-doc"},
          {"reference": "libstd-rust-1.75"},
          {"reference": "libstd-rust-dev"},
          {"reference": "rust-all"},
          {"reference": "rust-clippy"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rustc"},
          {"reference": "rustc-1.74"},
          {"reference": "rustc-1.76"},
          {"reference": "rustc-1.77"},
          {"reference": "rustc-1.78"},
          {"reference": "rustc-1.79"},
          {"reference": "rustc-1.80"},
          {"reference": "rustc-1.81"},
          {"reference": "rustc-1.82"},
          {"reference": "rustc-1.83"},
          {"reference": "rustc-1.84"},
          {"reference": "rustc-1.85"},
          {"reference": "rustc-1.89"},
          {"reference": "rustc-1.91"},
          {"reference": "rustfmt"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "cargo-1.85"},
          {"reference": "cargo-1.85-doc"},
          {"reference": "libstd-rust-1.85"},
          {"reference": "libstd-rust-1.85-dev"},
          {"reference": "rust-1.85-all"},
          {"reference": "rust-1.85-clippy"},
          {"reference": "rust-1.85-doc"},
          {"reference": "rust-1.85-gdb"},
          {"reference": "rust-1.85-lldb"},
          {"reference": "rust-1.85-src"},
          {"reference": "rustc-1.85"},
          {"reference": "rustc-1.88"},
          {"reference": "rustc-1.91"},
          {"reference": "rustfmt-1.85"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "cargo-1.93"},
          {"reference": "cargo-1.93-doc"},
          {"reference": "libstd-rust-1.93"},
          {"reference": "libstd-rust-1.93-dev"},
          {"reference": "rust-1.93-all"},
          {"reference": "rust-1.93-clippy"},
          {"reference": "rust-1.93-doc"},
          {"reference": "rust-1.93-gdb"},
          {"reference": "rust-1.93-lldb"},
          {"reference": "rust-1.93-miri"},
          {"reference": "rust-1.93-src"},
          {"reference": "rustc-1.91"},
          {"reference": "rustc-1.92"},
          {"reference": "rustc-1.93"},
          {"reference": "rustfmt-1.93"}
        ]
      }
    ]
  }
};

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