Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986386)

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

include('compat.inc');

if (description)
{
  script_id(268116);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2024-50296");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986386)");

  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-2025-986386 advisory.

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

    net: hns3: fix kernel crash when uninstalling driver

    When the driver is uninstalled and the VF is disabled concurrently, a
    kernel crash occurs. The reason is that the two actions call function
    pci_disable_sriov(). The num_VFs is checked to determine whether to
    release the corresponding resources. During the second calling, num_VFs
    is not 0 and the resource release function is called. However, the
    corresponding resource has been released during the first invoking.
    Therefore, the problem occurs:

    [15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address
    0000000000000020
    ...
    [15278.131557][T50670] Call trace:
    [15278.134686][T50670]  klist_put+0x28/0x12c
    [15278.138682][T50670]  klist_del+0x14/0x20
    [15278.142592][T50670]  device_del+0xbc/0x3c0
    [15278.146676][T50670]  pci_remove_bus_device+0x84/0x120
    [15278.151714][T50670]  pci_stop_and_remove_bus_device+0x6c/0x80
    [15278.157447][T50670]  pci_iov_remove_virtfn+0xb4/0x12c
    [15278.162485][T50670]  sriov_disable+0x50/0x11c
    [15278.166829][T50670]  pci_disable_sriov+0x24/0x30
    [15278.171433][T50670]  hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3]
    [15278.178039][T50670]  hclge_exit+0x28/0xd0 [hclge]
    [15278.182730][T50670]  __se_sys_delete_module.isra.0+0x164/0x230
    [15278.188550][T50670]  __arm64_sys_delete_module+0x1c/0x30
    [15278.193848][T50670]  invoke_syscall+0x50/0x11c
    [15278.198278][T50670]  el0_svc_common.constprop.0+0x158/0x164
    [15278.203837][T50670]  do_el0_svc+0x34/0xcc
    [15278.207834][T50670]  el0_svc+0x20/0x30

    For details, see the following figure.

         rmmod hclge              disable VFs
    ----------------------------------------------------
    hclge_exit()            sriov_numvfs_store()
      ...                     device_lock()
      pci_disable_sriov()     hns3_pci_sriov_configure()
                                pci_disable_sriov()
                                  sriov_disable()
        sriov_disable()             if !num_VFs :
          if !num_VFs :               return;
            return;                 sriov_del_vfs()
          sriov_del_vfs()             ...
            ...                       klist_put()
            klist_put()               ...
            ...                     num_VFs = 0;
          num_VFs = 0;        device_unlock();

    In this patch, when driver is removing, we get the device_lock()
    to protect num_VFs, just like sriov_numvfs_store().

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-2025-986386
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fa0ea441");
  # https://lore.kernel.org/linux-cve-announce/2024111900-CVE-2024-50296-774e@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24275bbb");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-50296");
  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-2024-50296");

  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:"2024/11/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/07");

  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) 2025 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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2403.3.0.0270.103.002', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2403.3.0.0270.103.002', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2403.3.0.0270.103.002', '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');
}