Linux Distros Unpatched Vulnerability : CVE-2026-61711

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

include('compat.inc');

if (description)
{
  script_id(366213);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/15");

  script_cve_id("CVE-2026-61711");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-61711");

  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.

  - BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and
    repeatable manner. Prior to 0.31.1, a custom frontend could place an invalid SecurityMode value in a
    crafted build request, and executor/oci/spec_linux.go treated the unsupported value as a non-sandbox mode
    without requiring the security.insecure entitlement. This disabled Seccomp and AppArmor protections for
    the build container even though Linux capabilities remained restricted. This issue is fixed in version
    0.31.1. (CVE-2026-61711)

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-2026-61711");
  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:P/A:P");
  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");
  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:N/PR:L/UI:N/VC:L/VI:L/VA:L/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-2026-61711");

  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:"2026/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:buildah");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:buildah-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-catatonit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-docker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-gvproxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-manpages");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:podman-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:buildah");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:buildah-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-catatonit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-docker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-gvproxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-manpages");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:podman-tests");
  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/CentOS Linux-8", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9");

  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/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "podman"},
          {"reference": "podman-docker"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-manpages"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-manpages"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "buildah"},
          {"reference": "buildah-tests"},
          {"reference": "podman"},
          {"reference": "podman-catatonit"},
          {"reference": "podman-docker"},
          {"reference": "podman-gvproxy"},
          {"reference": "podman-plugins"},
          {"reference": "podman-remote"},
          {"reference": "podman-tests"}
        ]
      }
    ]
  }
};

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');
}