Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010871)

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

include('compat.inc');

if (description)
{
  script_id(308660);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2022-50551");

  script_name(english:"Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010871)");

  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-2026-010871 advisory.

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

    wifi: brcmfmac: Fix potential shift-out-of-bounds in brcmf_fw_alloc_request()

    This patch fixes a shift-out-of-bounds in brcmfmac that occurs in
    BIT(chiprev) when a 'chiprev' provided by the device is too large.
    It should also not be equal to or greater than BITS_PER_TYPE(u32)
    as we do bitwise AND with a u32 variable and BIT(chiprev). The patch
    adds a check that makes the function return NULL if that is the case.
    Note that the NULL case is later handled by the bus-specific caller,
    brcmf_usb_probe_cb() or brcmf_usb_reset_resume(), for example.

    Found by a modified version of syzkaller.

    UBSAN: shift-out-of-bounds in drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
    shift exponent 151055786 is too large for 64-bit type 'long unsigned int'
    CPU: 0 PID: 1885 Comm: kworker/0:2 Tainted: G           O      5.14.0+ #132
    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+0x57/0x7d
     ubsan_epilogue+0x5/0x40
     __ubsan_handle_shift_out_of_bounds.cold+0x53/0xdb
     ? lock_chain_count+0x20/0x20
     brcmf_fw_alloc_request.cold+0x19/0x3ea
     ? brcmf_fw_get_firmwares+0x250/0x250
     ? brcmf_usb_ioctl_resp_wait+0x1a7/0x1f0
     brcmf_usb_get_fwname+0x114/0x1a0
     ? brcmf_usb_reset_resume+0x120/0x120
     ? number+0x6c4/0x9a0
     brcmf_c_process_clm_blob+0x168/0x590
     ? put_dec+0x90/0x90
     ? enable_ptr_key_workfn+0x20/0x20
     ? brcmf_common_pd_remove+0x50/0x50
     ? rcu_read_lock_sched_held+0xa1/0xd0
     brcmf_c_preinit_dcmds+0x673/0xc40
     ? brcmf_c_set_joinpref_default+0x100/0x100
     ? rcu_read_lock_sched_held+0xa1/0xd0
     ? rcu_read_lock_bh_held+0xb0/0xb0
     ? lock_acquire+0x19d/0x4e0
     ? find_held_lock+0x2d/0x110
     ? brcmf_usb_deq+0x1cc/0x260
     ? mark_held_locks+0x9f/0xe0
     ? lockdep_hardirqs_on_prepare+0x273/0x3e0
     ? _raw_spin_unlock_irqrestore+0x47/0x50
     ? trace_hardirqs_on+0x1c/0x120
     ? brcmf_usb_deq+0x1a7/0x260
     ? brcmf_usb_rx_fill_all+0x5a/0xf0
     brcmf_attach+0x246/0xd40
     ? wiphy_new_nm+0x1476/0x1d50
     ? kmemdup+0x30/0x40
     brcmf_usb_probe+0x12de/0x1690
     ? brcmf_usbdev_qinit.constprop.0+0x470/0x470
     usb_probe_interface+0x25f/0x710
     really_probe+0x1be/0xa90
     __driver_probe_device+0x2ab/0x460
     ? usb_match_id.part.0+0x88/0xc0
     driver_probe_device+0x49/0x120
     __device_attach_driver+0x18a/0x250
     ? driver_allows_async_probing+0x120/0x120
     bus_for_each_drv+0x123/0x1a0
     ? bus_rescan_devices+0x20/0x20
     ? lockdep_hardirqs_on_prepare+0x273/0x3e0
     ? trace_hardirqs_on+0x1c/0x120
     __device_attach+0x207/0x330
     ? device_bind_driver+0xb0/0xb0
     ? kobject_uevent_env+0x230/0x12c0
     bus_probe_device+0x1a2/0x260
     device_add+0xa61/0x1ce0
     ? __mutex_unlock_slowpath+0xe7/0x660
     ? __fw_devlink_link_to_suppliers+0x550/0x550
     usb_set_configuration+0x984/0x1770
     ? kernfs_create_link+0x175/0x230
     usb_generic_driver_probe+0x69/0x90
     usb_probe_device+0x9c/0x220
     really_probe+0x1be/0xa90
     __driver_probe_device+0x2ab/0x460
     driver_probe_device+0x49/0x120
     __device_attach_driver+0x18a/0x250
     ? driver_allows_async_probing+0x120/0x120
     bus_for_each_drv+0x123/0x1a0
     ? bus_rescan_devices+0x20/0x20
     ? lockdep_hardirqs_on_prepare+0x273/0x3e0
     ? trace_hardirqs_on+0x1c/0x120
     __device_attach+0x207/0x330
     ? device_bind_driver+0xb0/0xb0
     ? kobject_uevent_env+0x230/0x12c0
     bus_probe_device+0x1a2/0x260
     device_add+0xa61/0x1ce0
     ? __fw_devlink_link_to_suppliers+0x550/0x550
     usb_new_device.cold+0x463/0xf66
     ? hub_disconnect+0x400/0x400
     ? _raw_spin_unlock_irq+0x24/0x30
     hub_event+0x10d5/0x3330
     ? hub_port_debounce+0x280/0x280
     ? __lock_acquire+0x1671/0x5790
     ? wq_calc_node_cpumask+0x170/0x2a0
     ? 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+0x873/0x13e0
     ? lock_release+0x640/0x640
     ? pwq_dec_nr_in_flight+0x320/0x320
     ? rwlock_bug.part.0+0x90/0x90
     worker_thread+0x8b/0xd10
     ? __kthread_parkme+0xd9/0x1d0
     ? pr
    ---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-2026-010871
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0002bc26");
  # https://lore.kernel.org/linux-cve-announce/2025100759-CVE-2022-50551-7398@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9cc876b7");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50551");
  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: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:H/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-2022-50551");

  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:"2026/04/20");
  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:"^20.1060e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060e / 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': '1060e',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1060e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1060e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1060e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1060e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', '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');
}