Linux Distros Unpatched Vulnerability : CVE-2026-22801

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

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  script_id(282644);
  script_version("1.23");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/25");

  script_cve_id("CVE-2026-22801");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-22801");

  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.

  - LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable
    Network Graphics) raster image files. From 1.6.26 to 1.6.53, there is an integer truncation in the libpng
    simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read
    when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535
    bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to silence compiler warnings
    on 16-bit systems. This vulnerability is fixed in 1.6.54. (CVE-2026-22801)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-22801");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-22801");
  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:L/UI:N/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:"cvss_score_source", value:"CVE-2026-22801");

  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:"2026/01/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/13");

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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/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-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "libpng-dev"},
          {"reference": "libpng-tools"},
          {"reference": "libpng16-16-udeb"},
          {"reference": "libpng16-16t64"},
          {"reference": "thunderbird"},
          {"reference": "thunderbird-locale-af"},
          {"reference": "thunderbird-locale-ar"},
          {"reference": "thunderbird-locale-ast"},
          {"reference": "thunderbird-locale-be"},
          {"reference": "thunderbird-locale-bg"},
          {"reference": "thunderbird-locale-bn"},
          {"reference": "thunderbird-locale-bn-bd"},
          {"reference": "thunderbird-locale-br"},
          {"reference": "thunderbird-locale-ca"},
          {"reference": "thunderbird-locale-cak"},
          {"reference": "thunderbird-locale-cs"},
          {"reference": "thunderbird-locale-cy"},
          {"reference": "thunderbird-locale-da"},
          {"reference": "thunderbird-locale-de"},
          {"reference": "thunderbird-locale-dsb"},
          {"reference": "thunderbird-locale-el"},
          {"reference": "thunderbird-locale-en"},
          {"reference": "thunderbird-locale-en-gb"},
          {"reference": "thunderbird-locale-en-us"},
          {"reference": "thunderbird-locale-es"},
          {"reference": "thunderbird-locale-es-ar"},
          {"reference": "thunderbird-locale-es-es"},
          {"reference": "thunderbird-locale-et"},
          {"reference": "thunderbird-locale-eu"},
          {"reference": "thunderbird-locale-fa"},
          {"reference": "thunderbird-locale-fi"},
          {"reference": "thunderbird-locale-fr"},
          {"reference": "thunderbird-locale-fy"},
          {"reference": "thunderbird-locale-fy-nl"},
          {"reference": "thunderbird-locale-ga"},
          {"reference": "thunderbird-locale-ga-ie"},
          {"reference": "thunderbird-locale-gd"},
          {"reference": "thunderbird-locale-gl"},
          {"reference": "thunderbird-locale-he"},
          {"reference": "thunderbird-locale-hr"},
          {"reference": "thunderbird-locale-hsb"},
          {"reference": "thunderbird-locale-hu"},
          {"reference": "thunderbird-locale-hy"},
          {"reference": "thunderbird-locale-id"},
          {"reference": "thunderbird-locale-is"},
          {"reference": "thunderbird-locale-it"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "libpng"},
          {"reference": "libpng-devel"},
          {"reference": "libpng-static"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "java-25-openjdk"},
          {"reference": "java-25-openjdk-crypto-adapter"},
          {"reference": "java-25-openjdk-crypto-adapter-fastdebug"},
          {"reference": "java-25-openjdk-crypto-adapter-slowdebug"},
          {"reference": "java-25-openjdk-demo"},
          {"reference": "java-25-openjdk-demo-fastdebug"},
          {"reference": "java-25-openjdk-demo-slowdebug"},
          {"reference": "java-25-openjdk-devel"},
          {"reference": "java-25-openjdk-devel-fastdebug"},
          {"reference": "java-25-openjdk-devel-slowdebug"},
          {"reference": "java-25-openjdk-fastdebug"},
          {"reference": "java-25-openjdk-headless"},
          {"reference": "java-25-openjdk-headless-fastdebug"},
          {"reference": "java-25-openjdk-headless-slowdebug"},
          {"reference": "java-25-openjdk-javadoc"},
          {"reference": "java-25-openjdk-javadoc-zip"},
          {"reference": "java-25-openjdk-jmods"},
          {"reference": "java-25-openjdk-jmods-fastdebug"},
          {"reference": "java-25-openjdk-jmods-slowdebug"},
          {"reference": "java-25-openjdk-slowdebug"},
          {"reference": "java-25-openjdk-src"},
          {"reference": "java-25-openjdk-src-fastdebug"},
          {"reference": "java-25-openjdk-src-slowdebug"},
          {"reference": "java-25-openjdk-static-libs"},
          {"reference": "java-25-openjdk-static-libs-fastdebug"},
          {"reference": "java-25-openjdk-static-libs-slowdebug"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "java-25-openjdk"},
          {"reference": "java-25-openjdk-crypto-adapter"},
          {"reference": "java-25-openjdk-crypto-adapter-fastdebug"},
          {"reference": "java-25-openjdk-crypto-adapter-slowdebug"},
          {"reference": "java-25-openjdk-demo"},
          {"reference": "java-25-openjdk-demo-fastdebug"},
          {"reference": "java-25-openjdk-demo-slowdebug"},
          {"reference": "java-25-openjdk-devel"},
          {"reference": "java-25-openjdk-devel-fastdebug"},
          {"reference": "java-25-openjdk-devel-slowdebug"},
          {"reference": "java-25-openjdk-fastdebug"},
          {"reference": "java-25-openjdk-headless"},
          {"reference": "java-25-openjdk-headless-fastdebug"},
          {"reference": "java-25-openjdk-headless-slowdebug"},
          {"reference": "java-25-openjdk-javadoc"},
          {"reference": "java-25-openjdk-javadoc-zip"},
          {"reference": "java-25-openjdk-jmods"},
          {"reference": "java-25-openjdk-jmods-fastdebug"},
          {"reference": "java-25-openjdk-jmods-slowdebug"},
          {"reference": "java-25-openjdk-slowdebug"},
          {"reference": "java-25-openjdk-src"},
          {"reference": "java-25-openjdk-src-fastdebug"},
          {"reference": "java-25-openjdk-src-slowdebug"},
          {"reference": "java-25-openjdk-static-libs"},
          {"reference": "java-25-openjdk-static-libs-fastdebug"},
          {"reference": "java-25-openjdk-static-libs-slowdebug"}
        ]
      }
    ]
  }
};

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');
}