RHEL 8 : kernel (RHSA-2026:70402)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:70402. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(349148);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/23");

  script_cve_id(
    "CVE-2023-54120",
    "CVE-2023-54214",
    "CVE-2025-39964",
    "CVE-2025-71082",
    "CVE-2026-43334",
    "CVE-2026-45894",
    "CVE-2026-46043",
    "CVE-2026-46133",
    "CVE-2026-52918",
    "CVE-2026-53053",
    "CVE-2026-53062",
    "CVE-2026-53254",
    "CVE-2026-53256",
    "CVE-2026-63823",
    "CVE-2026-63947",
    "CVE-2026-63975",
    "CVE-2026-64534",
    "CVE-2026-64582",
    "CVE-2026-68188",
    "CVE-2026-68293"
  );
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/09/21");
  script_xref(name:"RHSA", value:"2026:70402");

  script_name(english:"RHEL 8 : kernel (RHSA-2026:70402)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2026:70402 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)

    * kernel: Linux kernel Bluetooth: Denial of Service via race condition in hidp_session_thread
    (CVE-2023-54120)

    * kernel: Bluetooth: L2CAP: Fix potential user-after-free (CVE-2023-54214)

    * kernel: Bluetooth: btusb: revert use of devm_kzalloc in btusb (CVE-2025-71082)

    * kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response
    (CVE-2026-43334)

    * kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)

    * kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)

    * kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)

    * kernel: Bluetooth: serialize accept_q access (CVE-2026-52918)

    * kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)

    * kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)

    * kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256)

    * kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254)

    * kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)

    * kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975)

    * kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947)

    * kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path (CVE-2026-64534)

    * kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)

    * kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)

    * kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios
    (CVE-2026-68188)

    Bug Fix(es) and Enhancement(s):

    * Intel IOMMU: possible circular locking dependency (JIRA:RHEL-243217)

    * xfs: repeated xfs_trans_cancel called from xfs_iomap_write_direct (JIRA:RHEL-251578)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2403545");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2425183");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2426069");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2429054");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2468050");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2481940");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2482127");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2482550");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2492092");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2492278");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2492310");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2492717");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2492795");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2502218");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2502346");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2502388");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2507399");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2511448");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2513150");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2513222");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_70402.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?602c72f6");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:70402");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-71082");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(120, 125, 191, 322, 364, 366, 367, 414, 416, 694, 820, 825, 826, 911, 1284);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/23");

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  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl", "linux_alt_patch_detect.nasl");
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}


include('rpm2.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'Red Hat' >!< os_product) audit(AUDIT_OS_NOT, 'Red Hat');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
if (!rhel_check_release(operator: 'ge', os_version: os_version, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + os_version);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var livepatch_source = get_one_kb_item('Host/livepatch-kernel-source');
  if (empty_or_null(livepatch_source)) livepatch_source = 'KSplice';
  rm_kb_item(name:'Host/livepatch-kernel-version');

  var cve_list = make_list('CVE-2023-54120', 'CVE-2023-54214', 'CVE-2025-39964', 'CVE-2025-71082', 'CVE-2026-43334', 'CVE-2026-45894', 'CVE-2026-46043', 'CVE-2026-46133', 'CVE-2026-52918', 'CVE-2026-53053', 'CVE-2026-53062', 'CVE-2026-53254', 'CVE-2026-53256', 'CVE-2026-63823', 'CVE-2026-63947', 'CVE-2026-63975', 'CVE-2026-64534', 'CVE-2026-64582', 'CVE-2026-68188', 'CVE-2026-68293');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, livepatch_source + ' hotfix for RHSA-2026:70402');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

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      'content/dist/rhel8/8.10/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.10/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.10/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/s390x/codeready-builder/debug',
      'content/dist/rhel8/8.6/s390x/codeready-builder/os',
      'content/dist/rhel8/8.6/s390x/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.8/ppc64le/codeready-builder/os',
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      'content/dist/rhel8/8.8/s390x/codeready-builder/debug',
      'content/dist/rhel8/8.8/s390x/codeready-builder/os',
      'content/dist/rhel8/8.8/s390x/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.8/x86_64/codeready-builder/os',
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      'content/dist/rhel8/8.9/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.9/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.9/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/s390x/codeready-builder/debug',
      'content/dist/rhel8/8.9/s390x/codeready-builder/os',
      'content/dist/rhel8/8.9/s390x/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8/aarch64/codeready-builder/os',
      'content/dist/rhel8/8/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/s390x/codeready-builder/debug',
      'content/dist/rhel8/8/s390x/codeready-builder/os',
      'content/dist/rhel8/8/s390x/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8/x86_64/codeready-builder/os',
      'content/dist/rhel8/8/x86_64/codeready-builder/source/SRPMS',
      'content/public/ubi/dist/ubi8/8/aarch64/codeready-builder/debug',
      'content/public/ubi/dist/ubi8/8/aarch64/codeready-builder/os',
      'content/public/ubi/dist/ubi8/8/aarch64/codeready-builder/source/SRPMS',
      'content/public/ubi/dist/ubi8/8/ppc64le/codeready-builder/debug',
      'content/public/ubi/dist/ubi8/8/ppc64le/codeready-builder/os',
      'content/public/ubi/dist/ubi8/8/ppc64le/codeready-builder/source/SRPMS',
      'content/public/ubi/dist/ubi8/8/s390x/codeready-builder/debug',
      'content/public/ubi/dist/ubi8/8/s390x/codeready-builder/os',
      'content/public/ubi/dist/ubi8/8/s390x/codeready-builder/source/SRPMS',
      'content/public/ubi/dist/ubi8/8/x86_64/codeready-builder/debug',
      'content/public/ubi/dist/ubi8/8/x86_64/codeready-builder/os',
      'content/public/ubi/dist/ubi8/8/x86_64/codeready-builder/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-tools-libs-devel-4.18.0-553.166.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.18.0-553.166.1.el8_10', 'cpu':'ppc64le', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.18.0-553.166.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var repo_relative_urls;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }

  if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];

  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(rpm:exists_check))) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bpftool / kernel / kernel-core / kernel-debug / kernel-debug-core / etc');
}