Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013541)

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

include('compat.inc');

if (description)
{
  script_id(309633);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/26");

  script_cve_id("CVE-2022-50881");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013541)");

  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-2026-013541 advisory.

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

    wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect()

    This patch fixes a use-after-free in ath9k that occurs in
    ath9k_hif_usb_disconnect() when ath9k_destroy_wmi() is trying to access
    'drv_priv' that has already been freed by ieee80211_free_hw(), called by
    ath9k_htc_hw_deinit(). The patch moves ath9k_destroy_wmi() before
    ieee80211_free_hw(). Note that urbs from the driver should be killed
    before freeing 'wmi' with ath9k_destroy_wmi() as their callbacks will
    access 'wmi'.

    Found by a modified version of syzkaller.

    ==================================================================
    BUG: KASAN: use-after-free in ath9k_destroy_wmi+0x38/0x40
    Read of size 8 at addr ffff8881069132a0 by task kworker/0:1/7

    CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #131
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org
    04/01/2014
    Workqueue: usb_hub_wq hub_event
    Call Trace:
     dump_stack_lvl+0x8e/0xd1
     print_address_description.constprop.0.cold+0x93/0x334
     ? ath9k_destroy_wmi+0x38/0x40
     ? ath9k_destroy_wmi+0x38/0x40
     kasan_report.cold+0x83/0xdf
     ? ath9k_destroy_wmi+0x38/0x40
     ath9k_destroy_wmi+0x38/0x40
     ath9k_hif_usb_disconnect+0x329/0x3f0
     ? ath9k_hif_usb_suspend+0x120/0x120
     ? usb_disable_interface+0xfc/0x180
     usb_unbind_interface+0x19b/0x7e0
     ? usb_autoresume_device+0x50/0x50
     device_release_driver_internal+0x44d/0x520
     bus_remove_device+0x2e5/0x5a0
     device_del+0x5b2/0xe30
     ? __device_link_del+0x370/0x370
     ? usb_remove_ep_devs+0x43/0x80
     ? remove_intf_ep_devs+0x112/0x1a0
     usb_disable_device+0x1e3/0x5a0
     usb_disconnect+0x267/0x870
     hub_event+0x168d/0x3950
     ? rcu_read_lock_sched_held+0xa1/0xd0
     ? hub_port_debounce+0x2e0/0x2e0
     ? check_irq_usage+0x860/0xf20
     ? drain_workqueue+0x281/0x360
     ? lock_release+0x640/0x640
     ? rcu_read_lock_sched_held+0xa1/0xd0
     ? rcu_read_lock_bh_held+0xb0/0xb0
     ? lockdep_hardirqs_on_prepare+0x273/0x3e0
     process_one_work+0x92b/0x1460
     ? pwq_dec_nr_in_flight+0x330/0x330
     ? rwlock_bug.part.0+0x90/0x90
     worker_thread+0x95/0xe00
     ? __kthread_parkme+0x115/0x1e0
     ? process_one_work+0x1460/0x1460
     kthread+0x3a1/0x480
     ? set_kthread_struct+0x120/0x120
     ret_from_fork+0x1f/0x30

    The buggy address belongs to the page:
    page:ffffea00041a44c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106913
    flags: 0x200000000000000(node=0|zone=2)
    raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000
    raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
    page dumped because: kasan: bad access detected
    page_owner tracks the page as freed
    page last allocated via order 3, migratetype Unmovable, gfp_mask
    0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7, ts 38347963444, free_ts 41399957635
     prep_new_page+0x1aa/0x240
     get_page_from_freelist+0x159a/0x27c0
     __alloc_pages+0x2da/0x6a0
     alloc_pages+0xec/0x1e0
     kmalloc_order+0x39/0xf0
     kmalloc_order_trace+0x19/0x120
     __kmalloc+0x308/0x390
     wiphy_new_nm+0x6f5/0x1dd0
     ieee80211_alloc_hw_nm+0x36d/0x2230
     ath9k_htc_probe_device+0x9d/0x1e10
     ath9k_htc_hw_init+0x34/0x50
     ath9k_hif_usb_firmware_cb+0x25f/0x4e0
     request_firmware_work_func+0x131/0x240
     process_one_work+0x92b/0x1460
     worker_thread+0x95/0xe00
     kthread+0x3a1/0x480
    page last free stack trace:
     free_pcp_prepare+0x3d3/0x7f0
     free_unref_page+0x1e/0x3d0
     device_release+0xa4/0x240
     kobject_put+0x186/0x4c0
     put_device+0x20/0x30
     ath9k_htc_disconnect_device+0x1cf/0x2c0
     ath9k_htc_hw_deinit+0x26/0x30
     ath9k_hif_usb_disconnect+0x2d9/0x3f0
     usb_unbind_interface+0x19b/0x7e0
     device_release_driver_internal+0x44d/0x520
     bus_remove_device+0x2e5/0x5a0
     device_del+0x5b2/0xe30
     usb_disable_device+0x1e3/0x5a0
     usb_disconnect+0x267/0x870
     hub_event+0x168d/0x3950
     process_one_work+0x92b/0x1460

    Memory state around the buggy address:
     ffff888106913180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
     ffff888106913200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    >ffff888
    ---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-2026-013541
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?559d0161");
  # https://lore.kernel.org/linux-cve-announce/2025123025-CVE-2022-50881-88e5@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24d677be");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50881");
  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-2022-50881");

  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:"2026/04/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/22");

  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:"^20.1060a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060a / 20.1070a', '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 && 'loongarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1060a',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1060a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1060a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', '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');
}