Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013191)

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

include('compat.inc');

if (description)
{
  script_id(308025);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-54283");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013191)");

  script_set_attribute(attribute:"synopsis", value:
"The Unity Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the
UTSA-2026-013191 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Address KCSAN report on bpf_lru_list

    KCSAN reported a data-race when accessing node->ref.
    Although node->ref does not have to be accurate,
    take this chance to use a more common READ_ONCE() and WRITE_ONCE()
    pattern instead of data_race().

    There is an existing bpf_lru_node_is_ref() and bpf_lru_node_set_ref().
    This patch also adds bpf_lru_node_clear_ref() to do the
    WRITE_ONCE(node->ref, 0) also.

    ==================================================================
    BUG: KCSAN: data-race in __bpf_lru_list_rotate / __htab_lru_percpu_map_update_elem

    write to 0xffff888137038deb of 1 bytes by task 11240 on cpu 1:
    __bpf_lru_node_move kernel/bpf/bpf_lru_list.c:113 [inline]
    __bpf_lru_list_rotate_active kernel/bpf/bpf_lru_list.c:149 [inline]
    __bpf_lru_list_rotate+0x1bf/0x750 kernel/bpf/bpf_lru_list.c:240
    bpf_lru_list_pop_free_to_local kernel/bpf/bpf_lru_list.c:329 [inline]
    bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:447 [inline]
    bpf_lru_pop_free+0x638/0xe20 kernel/bpf/bpf_lru_list.c:499
    prealloc_lru_pop kernel/bpf/hashtab.c:290 [inline]
    __htab_lru_percpu_map_update_elem+0xe7/0x820 kernel/bpf/hashtab.c:1316
    bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2313
    bpf_map_update_value+0x2a9/0x370 kernel/bpf/syscall.c:200
    generic_map_update_batch+0x3ae/0x4f0 kernel/bpf/syscall.c:1687
    bpf_map_do_batch+0x2d9/0x3d0 kernel/bpf/syscall.c:4534
    __sys_bpf+0x338/0x810
    __do_sys_bpf kernel/bpf/syscall.c:5096 [inline]
    __se_sys_bpf kernel/bpf/syscall.c:5094 [inline]
    __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5094
    do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
    entry_SYSCALL_64_after_hwframe+0x63/0xcd

    read to 0xffff888137038deb of 1 bytes by task 11241 on cpu 0:
    bpf_lru_node_set_ref kernel/bpf/bpf_lru_list.h:70 [inline]
    __htab_lru_percpu_map_update_elem+0x2f1/0x820 kernel/bpf/hashtab.c:1332
    bpf_percpu_hash_update+0x5e/0x90 kernel/bpf/hashtab.c:2313
    bpf_map_update_value+0x2a9/0x370 kernel/bpf/syscall.c:200
    generic_map_update_batch+0x3ae/0x4f0 kernel/bpf/syscall.c:1687
    bpf_map_do_batch+0x2d9/0x3d0 kernel/bpf/syscall.c:4534
    __sys_bpf+0x338/0x810
    __do_sys_bpf kernel/bpf/syscall.c:5096 [inline]
    __se_sys_bpf kernel/bpf/syscall.c:5094 [inline]
    __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5094
    do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
    entry_SYSCALL_64_after_hwframe+0x63/0xcd

    value changed: 0x01 -> 0x00

    Reported by Kernel Concurrency Sanitizer on:
    CPU: 0 PID: 11241 Comm: syz-executor.3 Not tainted 6.3.0-rc7-syzkaller-00136-g6a66fdd29ea1 #0
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
    ==================================================================

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://src.uniontech.com/#/security_advisory_detail?utsa_id=UTSA-2026-013191
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4d799285");
  # https://lore.kernel.org/linux-cve-announce/2025123026-CVE-2023-54283-b319@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ebc6e777");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-54283");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:P/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/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-2023-54283");

  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:"2021/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Unity 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("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/UOS-Server/release", "Host/UOS-Server/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.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) || 'UOS Server' >!< os_product) audit(AUDIT_OS_NOT, 'UOS Server');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'UOS Server');
if (! preg(pattern:"^20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1070e', 'UOS Server ' + os_version);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'amd64' >!< cpu && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', '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_WARNING,
      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');
}