Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005170)

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

include('compat.inc');

if (description)
{
  script_id(296957);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/27");

  script_cve_id("CVE-2024-50150");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005170)");

  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-2026-005170 advisory.

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

    usb: typec: altmode should keep reference to parent

    The altmode device release refers to its parent device, but without keeping
    a reference to it.

    When registering the altmode, get a reference to the parent and put it in
    the release function.

    Before this fix, when using CONFIG_DEBUG_KOBJECT_RELEASE, we see issues
    like this:

    [   43.572860] kobject: 'port0.0' (ffff8880057ba008): kobject_release, parent 0000000000000000 (delayed
    3000)
    [   43.573532] kobject: 'port0.1' (ffff8880057bd008): kobject_release, parent 0000000000000000 (delayed
    1000)
    [   43.574407] kobject: 'port0' (ffff8880057b9008): kobject_release, parent 0000000000000000 (delayed
    3000)
    [   43.575059] kobject: 'port1.0' (ffff8880057ca008): kobject_release, parent 0000000000000000 (delayed
    4000)
    [   43.575908] kobject: 'port1.1' (ffff8880057c9008): kobject_release, parent 0000000000000000 (delayed
    4000)
    [   43.576908] kobject: 'typec' (ffff8880062dbc00): kobject_release, parent 0000000000000000 (delayed
    4000)
    [   43.577769] kobject: 'port1' (ffff8880057bf008): kobject_release, parent 0000000000000000 (delayed
    3000)
    [   46.612867] ==================================================================
    [   46.613402] BUG: KASAN: slab-use-after-free in typec_altmode_release+0x38/0x129
    [   46.614003] Read of size 8 at addr ffff8880057b9118 by task kworker/2:1/48
    [   46.614538]
    [   46.614668] CPU: 2 UID: 0 PID: 48 Comm: kworker/2:1 Not tainted 6.12.0-rc1-00138-gedbae730ad31 #535
    [   46.615391] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
    [   46.616042] Workqueue: events kobject_delayed_cleanup
    [   46.616446] Call Trace:
    [   46.616648]  <TASK>
    [   46.616820]  dump_stack_lvl+0x5b/0x7c
    [   46.617112]  ? typec_altmode_release+0x38/0x129
    [   46.617470]  print_report+0x14c/0x49e
    [   46.617769]  ? rcu_read_unlock_sched+0x56/0x69
    [   46.618117]  ? __virt_addr_valid+0x19a/0x1ab
    [   46.618456]  ? kmem_cache_debug_flags+0xc/0x1d
    [   46.618807]  ? typec_altmode_release+0x38/0x129
    [   46.619161]  kasan_report+0x8d/0xb4
    [   46.619447]  ? typec_altmode_release+0x38/0x129
    [   46.619809]  ? process_scheduled_works+0x3cb/0x85f
    [   46.620185]  typec_altmode_release+0x38/0x129
    [   46.620537]  ? process_scheduled_works+0x3cb/0x85f
    [   46.620907]  device_release+0xaf/0xf2
    [   46.621206]  kobject_delayed_cleanup+0x13b/0x17a
    [   46.621584]  process_scheduled_works+0x4f6/0x85f
    [   46.621955]  ? __pfx_process_scheduled_works+0x10/0x10
    [   46.622353]  ? hlock_class+0x31/0x9a
    [   46.622647]  ? lock_acquired+0x361/0x3c3
    [   46.622956]  ? move_linked_works+0x46/0x7d
    [   46.623277]  worker_thread+0x1ce/0x291
    [   46.623582]  ? __kthread_parkme+0xc8/0xdf
    [   46.623900]  ? __pfx_worker_thread+0x10/0x10
    [   46.624236]  kthread+0x17e/0x190
    [   46.624501]  ? kthread+0xfb/0x190
    [   46.624756]  ? __pfx_kthread+0x10/0x10
    [   46.625015]  ret_from_fork+0x20/0x40
    [   46.625268]  ? __pfx_kthread+0x10/0x10
    [   46.625532]  ret_from_fork_asm+0x1a/0x30
    [   46.625805]  </TASK>
    [   46.625953]
    [   46.626056] Allocated by task 678:
    [   46.626287]  kasan_save_stack+0x24/0x44
    [   46.626555]  kasan_save_track+0x14/0x2d
    [   46.626811]  __kasan_kmalloc+0x3f/0x4d
    [   46.627049]  __kmalloc_noprof+0x1bf/0x1f0
    [   46.627362]  typec_register_port+0x23/0x491
    [   46.627698]  cros_typec_probe+0x634/0xbb6
    [   46.628026]  platform_probe+0x47/0x8c
    [   46.628311]  really_probe+0x20a/0x47d
    [   46.628605]  device_driver_attach+0x39/0x72
    [   46.628940]  bind_store+0x87/0xd7
    [   46.629213]  kernfs_fop_write_iter+0x1aa/0x218
    [   46.629574]  vfs_write+0x1d6/0x29b
    [   46.629856]  ksys_write+0xcd/0x13b
    [   46.630128]  do_syscall_64+0xd4/0x139
    [   46.630420]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
    [   46.630820]
    [   46.630946] Freed by task 48:
    [   46.631182]  kasan_save_stack+0x24/0x44
    [   46.631493]  kasan_save_track+0x14/0x2d
    [   46.631799]  kasan_save_free_info+0x3f/0x4d
    [   46.632144]  __kasan_slab_free+0x37/0x45
    [   46.632474]
    ---truncated---

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-2026-005170
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f011864d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-50150");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-50150");

  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:"2024/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/27");

  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:"^20.1050e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e', '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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1050e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', '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');
}