Oracle Linux 8 : ELSA-2026-66325-0: / kernel (ELSA-2026-663250)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-663250.
##

include('compat.inc');

if (description)
{
  script_id(344787);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/11");

  script_cve_id(
    "CVE-2025-68745",
    "CVE-2026-46149",
    "CVE-2026-52917",
    "CVE-2026-52942",
    "CVE-2026-52986",
    "CVE-2026-53091",
    "CVE-2026-53246",
    "CVE-2026-63801",
    "CVE-2026-63971",
    "CVE-2026-64015",
    "CVE-2026-64113",
    "CVE-2026-68117",
    "CVE-2026-68300",
    "CVE-2026-68315",
    "CVE-2026-68376"
  );

  script_name(english:"Oracle Linux 8 : ELSA-2026-66325-0: / kernel (ELSA-2026-663250)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2026-663250 advisory.

    - tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done (Xin Long) [RHEL-228877] {CVE-2026-63801}
    - tipc: clear sock->sk on the failed-insert path in tipc_sk_create() (Xin Long) [RHEL-238050]
    {CVE-2026-68117}
    - sctp: fix race between sctp_wait_for_connect and peeloff (Xin Long) [RHEL-229464] {CVE-2026-63971}
    - sctp: diag: reject stale associations in dump_one path (Xin Long) [RHEL-231561] {CVE-2026-52917}
    - sctp: validate stream count in sctp_process_strreset_inreq() (Xin Long) [RHEL-236135] {CVE-2026-68315}
    - sctp: fix auth_hmacs array size in struct sctp_cookie (Xin Long) [RHEL-237394] {CVE-2026-68376}
    - sctp: auth: verify auth requirement when auth_chunk is NULL (Xin Long) [RHEL-237088] {CVE-2026-68300}
    - sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (Xin Long) [RHEL-190202]
    {CVE-2026-53246}
    - netfilter: nf_log: validate MAC header was set before dumping it (CKI Backport Bot) [RHEL-232055]
    {CVE-2026-52942}
    - netfilter: nf_conntrack_sip: don't use simple_strtoul (CKI Backport Bot) [RHEL-232024] {CVE-2026-52986}
    - scsi: qla2xxx: Clear cmds after chip reset (CKI Backport Bot) [RHEL-230822] {CVE-2025-68745}
    - scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CKI Backport Bot)
    [RHEL-225791] {CVE-2026-46149}
    - security/keys: fix missed RCU read section on lookup (Bruno Meneguele) [RHEL-225679] {CVE-2026-64015}
    - ixgbevf: fix use-after-free in VEPA multicast source pruning (CKI Backport Bot) [RHEL-227760]
    {CVE-2026-64113}
    - xfrm: Don't clobber inner headers when already set (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: pull headers in qdisc_pkt_len_segs_init() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: qdisc_pkt_len_segs_init() cleanup (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: use qdisc_pkt_len_segs_init() in sch_handle_ingress() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net_sched: initialize qdisc_skb_cb(skb)->pkt_segs in qdisc_pkt_len_init() (Ivan Vecera) [RHEL-188227]
    {CVE-2026-53091}
    - net: init shinfo->gso_segs from qdisc_pkt_len_init() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: add more sanity checks to qdisc_pkt_len_init() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net_sched: make room for (struct qdisc_skb_cb)->pkt_segs (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: account for encap headers in qdisc pkt len (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - sch_cake: do not use skb_mac_header() in cake_overhead() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: do not use skb_mac_header() in qdisc_pkt_len_init() (Ivan Vecera) [RHEL-188227] {CVE-2026-53091}
    - net: Skip GSO length estimation if transport header is not set (Ivan Vecera) [RHEL-188227]
    {CVE-2026-53091}
    - rhashtable: clear stale iter->p on table restart (CKI Backport Bot) [RHEL-248433] {CVE-2026-64563}
    - net: bridge: stop fast-leave after deleting a port group (CKI Backport Bot) [RHEL-246938]
    {CVE-2026-74480}
    - nvmet-rdma: handle inline data with a nonzero offset (CKI Backport Bot) [RHEL-244910] {CVE-2026-72129}
    - crypto: pcrypt - Fix handling of MAY_BACKLOG requests (Ricardo Robaina) [RHEL-226702] {CVE-2026-43493}
    - crypto: pcrypt - Delay write to padata->info (Ricardo Robaina) [RHEL-226702] {CVE-2026-43493}
    - crypto: pcrypt - Do not clear MAY_SLEEP flag in original request (Ricardo Robaina) [RHEL-226702]
    {CVE-2026-43493}
    - smb: client: validate DFS referral PathConsumed (CKI Backport Bot) [RHEL-237655] {CVE-2026-68343}
    - netfilter: synproxy: refresh tcphdr after skb_ensure_writable (CKI Backport Bot) [RHEL-228903]
    {CVE-2026-64007}

Tenable has extracted the preceding description block directly from the Oracle 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://linux.oracle.com/errata/ELSA-2026-66325-0.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-68300");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/12/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8:10:baseos_patch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-abi-stablelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-cross-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-perf");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

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

  script_dependencies("linux_alt_patch_detect.nasl", "ssh_get_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm2.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) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_product)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
if (! preg(pattern:"^8([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Oracle Linux 8.x', 'Oracle Linux ' + 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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var machine_uptrack_level = get_one_kb_item('Host/livepatch-kernel-version');
var livepatch_source = get_one_kb_item('Host/livepatch-kernel-source');
if (empty_or_null(livepatch_source)) livepatch_source = 'KSplice';

if (machine_uptrack_level)
{
  var trimmed_uptrack_level = ereg_replace(string:machine_uptrack_level, pattern:"\.(x86_64|i[3-6]86|aarch64)$", replace:'');
  var fixed_uptrack_levels = ['4.18.0-553.162.1.el8_10'];
  foreach var fixed_uptrack_level ( fixed_uptrack_levels ) {
    if (rpm_spec_vers_cmp(a:trimmed_uptrack_level, b:fixed_uptrack_level) >= 0)
    {
      audit(AUDIT_PATCH_INSTALLED, livepatch_source + ' hotfix for ELSA-2026-663250');
    }
  }
  __rpm_report = 'Running ' + livepatch_source + ' level of ' + trimmed_uptrack_level + ' does not meet the minimum fixed level of ' + join(fixed_uptrack_levels, sep:' / ') + ' for this advisory.\n\n';
}

var kernel_major_minor = get_kb_item('Host/uname/major_minor');
if (empty_or_null(kernel_major_minor)) exit(1, 'Unable to determine kernel major-minor level.');
var expected_kernel_major_minor = '4.18';
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, 'running kernel level ' + expected_kernel_major_minor + ', it is running kernel level ' + kernel_major_minor);

var constraints = [
  {
    'release': '8',
    'pkgs': [
      {'reference':'bpftool-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-cross-headers-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-4.18.0-553.162.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'bpftool-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-abi-stablelists-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-core-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-cross-headers-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-core-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-extra-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-extra-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-4.18.0-553.162.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

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 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;
  }
  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 &&
        ## (no known rpm to check OR known rpm_exists)
        (!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)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  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-abi-stablelists / etc');
}