Unity Linux 20.1070e Security Update: kernel (UTSA-2026-011376)

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

include('compat.inc');

if (description)
{
  script_id(308398);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-52808");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-011376)");

  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-2026-011376 advisory.

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

    scsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs

    If init debugfs failed during device registration due to memory allocation
    failure, debugfs_remove_recursive() is called, after which debugfs_dir is
    not set to NULL. debugfs_remove_recursive() will be called again during
    device removal. As a result, illegal pointer is accessed.

    [ 1665.467244] hisi_sas_v3_hw 0000:b4:02.0: failed to init debugfs!
    ...
    [ 1669.836708] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0
    [ 1669.872669] pc : down_write+0x24/0x70
    [ 1669.876315] lr : down_write+0x1c/0x70
    [ 1669.879961] sp : ffff000036f53a30
    [ 1669.883260] x29: ffff000036f53a30 x28: ffffa027c31549f8
    [ 1669.888547] x27: ffffa027c3140000 x26: 0000000000000000
    [ 1669.893834] x25: ffffa027bf37c270 x24: ffffa027bf37c270
    [ 1669.899122] x23: ffff0000095406b8 x22: ffff0000095406a8
    [ 1669.904408] x21: 0000000000000000 x20: ffffa027bf37c310
    [ 1669.909695] x19: 00000000000000a0 x18: ffff8027dcd86f10
    [ 1669.914982] x17: 0000000000000000 x16: 0000000000000000
    [ 1669.920268] x15: 0000000000000000 x14: ffffa0274014f870
    [ 1669.925555] x13: 0000000000000040 x12: 0000000000000228
    [ 1669.930842] x11: 0000000000000020 x10: 0000000000000bb0
    [ 1669.936129] x9 : ffff000036f537f0 x8 : ffff80273088ca10
    [ 1669.941416] x7 : 000000000000001d x6 : 00000000ffffffff
    [ 1669.946702] x5 : ffff000008a36310 x4 : ffff80273088be00
    [ 1669.951989] x3 : ffff000009513e90 x2 : 0000000000000000
    [ 1669.957276] x1 : 00000000000000a0 x0 : ffffffff00000001
    [ 1669.962563] Call trace:
    [ 1669.965000]  down_write+0x24/0x70
    [ 1669.968301]  debugfs_remove_recursive+0x5c/0x1b0
    [ 1669.972905]  hisi_sas_debugfs_exit+0x24/0x30 [hisi_sas_main]
    [ 1669.978541]  hisi_sas_v3_remove+0x130/0x150 [hisi_sas_v3_hw]
    [ 1669.984175]  pci_device_remove+0x48/0xd8
    [ 1669.988082]  device_release_driver_internal+0x1b4/0x250
    [ 1669.993282]  device_release_driver+0x28/0x38
    [ 1669.997534]  pci_stop_bus_device+0x84/0xb8
    [ 1670.001611]  pci_stop_and_remove_bus_device_locked+0x24/0x40
    [ 1670.007244]  remove_store+0xfc/0x140
    [ 1670.010802]  dev_attr_store+0x44/0x60
    [ 1670.014448]  sysfs_kf_write+0x58/0x80
    [ 1670.018095]  kernfs_fop_write+0xe8/0x1f0
    [ 1670.022000]  __vfs_write+0x60/0x190
    [ 1670.025472]  vfs_write+0xac/0x1c0
    [ 1670.028771]  ksys_write+0x6c/0xd8
    [ 1670.032071]  __arm64_sys_write+0x24/0x30
    [ 1670.035977]  el0_svc_common+0x78/0x130
    [ 1670.039710]  el0_svc_handler+0x38/0x78
    [ 1670.043442]  el0_svc+0x8/0xc

    To fix this, set debugfs_dir to NULL after debugfs_remove_recursive().

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-2026-011376
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?85b6d703");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-52808");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/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:L/PR:L/UI:N/S:U/C:N/I:N/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-2023-52808");

  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:"2024/01/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/20");
  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-5.10.0-75', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-75', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-75', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-75', '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');
}