Oracle Linux 10 : kernel (ELSA-2026-54343)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-54343.
##

include('compat.inc');

if (description)
{
  script_id(335462);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/14");

  script_cve_id(
    "CVE-2026-53202",
    "CVE-2026-53264",
    "CVE-2026-63887",
    "CVE-2026-64300"
  );

  script_name(english:"Oracle Linux 10 : kernel (ELSA-2026-54343)");

  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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in
the ELSA-2026-54343 advisory.

    - scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf (Maurizio Lombardi)
    [RHEL-213198] {CVE-2026-63887}
    - perf/aux: Fix page UAF in map_range() (CKI Backport Bot) [RHEL-218475] {CVE-2026-64300}
    - net/sched: act_api: use RCU with deferred freeing for action lifecycle (CKI Backport Bot) [RHEL-218188]
    {CVE-2026-53264}
    - KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level (Aidan Wallace)
    [RHEL-213472] {CVE-2026-63807}
    - accel/ivpu: Fix signed integer truncation in IPC receive (CKI Backport Bot) [RHEL-190054]
    {CVE-2026-53202}
    - netfilter: nf_tables: use list_del_rcu for netlink hooks (Florian Westphal) [RHEL-185311]
    {CVE-2026-46324}
    - netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO (Florian Westphal) [RHEL-185311]
    {CVE-2026-45841}
    - nfnetlink_osf: validate individual option lengths in fingerprints (Florian Westphal) [RHEL-185311]
    {CVE-2026-23397}
    - netfilter: nft_ct: fix use-after-free in timeout object destroy (Florian Westphal) [RHEL-185311]
    {CVE-2026-31665}
    - netfilter: xt_multiport: validate range encoding in checkentry (Florian Westphal) [RHEL-185311]
    {CVE-2026-31681}
    - netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator (Florian Westphal) [RHEL-185311]
    {CVE-2026-43085}
    - netfilter: nf_tables: reject immediate NF_QUEUE verdict (Florian Westphal) [RHEL-185311]
    {CVE-2026-43024}
    - netfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP (Florian
    Westphal) [RHEL-185311] {CVE-2026-31424}
    - netfilter: ctnetlink: ignore explicit helper on new expectations (Florian Westphal) [RHEL-185311]
    {CVE-2026-43025}
    - netfilter: ctnetlink: zero expect NAT fields when CTA_EXPECT_NAT absent (Florian Westphal) [RHEL-185311]
    {CVE-2026-43026}
    - netfilter: x_tables: ensure names are nul-terminated (Florian Westphal) [RHEL-185311] {CVE-2026-43028}
    - netfilter: nfnetlink_log: account for netlink header size (Florian Westphal) [RHEL-185311]
    {CVE-2026-31416}
    - netfilter: ctnetlink: use netlink policy range checks (Florian Westphal) [RHEL-185311] {CVE-2026-31495}
    - netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check() (Florian Westphal) [RHEL-185311]
    {CVE-2026-31674}
    - netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD (Florian Westphal)
    [RHEL-185311] {CVE-2026-31428}
    - netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (Florian Westphal)
    [RHEL-185311] {CVE-2026-43114}
    - nf_tables: nft_dynset: fix possible stateful expression memleak in error path (Florian Westphal)
    [RHEL-185311] {CVE-2026-23399}
    - netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case (Florian Westphal) [RHEL-185311]
    {CVE-2026-23456}
    - netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp() (Florian Westphal)
    [RHEL-185311] {CVE-2026-23457}
    - netfilter: conntrack: add missing netlink policy validations (Florian Westphal) [RHEL-185311]
    {CVE-2026-31407}
    - netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct() (Florian Westphal) [RHEL-185311]
    {CVE-2026-23458}
    - netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path (Florian Westphal) [RHEL-185311]
    {CVE-2026-43451}
    - netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop() (Florian Westphal)
    [RHEL-185311] {CVE-2026-43453}
    - netfilter: nf_tables: unconditionally bump set->nelems before insertion (Florian Westphal) [RHEL-185311]
    {CVE-2026-23272}
    - netfilter: nf_conntrack_h323: fix OOB read in decode_choice() (Florian Westphal) [RHEL-185311]
    {CVE-2026-43233}
    - netfilter: nf_tables: always walk all pending catchall elements (Florian Westphal) [RHEL-185311]
    {CVE-2026-23278}

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-2026-54343.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-2026-63887");

  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:"2026/06/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:10:2:baseos_patch");
  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-devel-matched");
  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-core");
  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-debug-uki-virt");
  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-devel-matched");
  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-core");
  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-modules-extra-matched");
  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:kernel-uki-virt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uki-virt-addons");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libperf");
  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:"cpe", value:"p-cpe:/a:oracle:linux:rtla");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:rv");
  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:"^10([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Oracle Linux 10.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 = ['6.12.0-211.47.1.el10_2'];
  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-2026-54343');
    }
  }
  __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 = '6.12';
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': '10',
    'pkgs': [
      {'reference':'kernel-cross-headers-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libperf-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rtla-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rv-6.12.0-211.47.1.el10_2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-abi-stablelists-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-core-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-cross-headers-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-core-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-devel-matched-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-core-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-modules-extra-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-debug-uki-virt-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-devel-matched-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-headers-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-core-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-extra-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-modules-extra-matched-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-tools-libs-devel-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-uki-virt-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-uki-virt-addons-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libperf-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perf-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-perf-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rtla-6.12.0-211.47.1.el10_2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'rv-6.12.0-211.47.1.el10_2', '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, 'kernel / kernel-abi-stablelists / kernel-core / etc');
}