Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987153)

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

include('compat.inc');

if (description)
{
  script_id(268850);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2022-48759");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987153)");

  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-2025-987153 advisory.

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

    rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev

    struct rpmsg_ctrldev contains a struct cdev. The current code frees
    the rpmsg_ctrldev struct in rpmsg_ctrldev_release_device(), but the
    cdev is a managed object, therefore its release is not predictable
    and the rpmsg_ctrldev could be freed before the cdev is entirely
    released, as in the backtrace below.

    [   93.625603] ODEBUG: free active (active state 0) object type: timer_list hint:
    delayed_work_timer_fn+0x0/0x7c
    [   93.636115] WARNING: CPU: 0 PID: 12 at lib/debugobjects.c:488 debug_print_object+0x13c/0x1b0
    [   93.644799] Modules linked in: veth xt_cgroup xt_MASQUERADE rfcomm algif_hash algif_skcipher af_alg
    uinput ip6table_nat fuse uvcvideo videobuf2_vmalloc venus_enc venus_dec videobuf2_dma_contig hci_uart
    btandroid btqca snd_soc_rt5682_i2c bluetooth qcom_spmi_temp_alarm snd_soc_rt5682v
    [   93.715175] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G    B             5.4.163-lockdep #26
    [   93.723855] Hardware name: Google Lazor (rev3 - 8) with LTE (DT)
    [   93.730055] Workqueue: events kobject_delayed_cleanup
    [   93.735271] pstate: 60c00009 (nZCv daif +PAN +UAO)
    [   93.740216] pc : debug_print_object+0x13c/0x1b0
    [   93.744890] lr : debug_print_object+0x13c/0x1b0
    [   93.749555] sp : ffffffacf5bc7940
    [   93.752978] x29: ffffffacf5bc7940 x28: dfffffd000000000
    [   93.758448] x27: ffffffacdb11a800 x26: dfffffd000000000
    [   93.763916] x25: ffffffd0734f856c x24: dfffffd000000000
    [   93.769389] x23: 0000000000000000 x22: ffffffd0733c35b0
    [   93.774860] x21: ffffffd0751994a0 x20: ffffffd075ec27c0
    [   93.780338] x19: ffffffd075199100 x18: 00000000000276e0
    [   93.785814] x17: 0000000000000000 x16: dfffffd000000000
    [   93.791291] x15: ffffffffffffffff x14: 6e6968207473696c
    [   93.796768] x13: 0000000000000000 x12: ffffffd075e2b000
    [   93.802244] x11: 0000000000000001 x10: 0000000000000000
    [   93.807723] x9 : d13400dff1921900 x8 : d13400dff1921900
    [   93.813200] x7 : 0000000000000000 x6 : 0000000000000000
    [   93.818676] x5 : 0000000000000080 x4 : 0000000000000000
    [   93.824152] x3 : ffffffd0732a0fa4 x2 : 0000000000000001
    [   93.829628] x1 : ffffffacf5bc7580 x0 : 0000000000000061
    [   93.835104] Call trace:
    [   93.837644]  debug_print_object+0x13c/0x1b0
    [   93.841963]  __debug_check_no_obj_freed+0x25c/0x3c0
    [   93.846987]  debug_check_no_obj_freed+0x18/0x20
    [   93.851669]  slab_free_freelist_hook+0xbc/0x1e4
    [   93.856346]  kfree+0xfc/0x2f4
    [   93.859416]  rpmsg_ctrldev_release_device+0x78/0xb8
    [   93.864445]  device_release+0x84/0x168
    [   93.868310]  kobject_cleanup+0x12c/0x298
    [   93.872356]  kobject_delayed_cleanup+0x10/0x18
    [   93.876948]  process_one_work+0x578/0x92c
    [   93.881086]  worker_thread+0x804/0xcf8
    [   93.884963]  kthread+0x2a8/0x314
    [   93.888303]  ret_from_fork+0x10/0x18

    The cdev_device_add/del() API was created to address this issue (see
    commit '233ed09d7fda (chardev: add helper function to register char
    devs with a struct device)'), use it instead of cdev add/del().

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-2025-987153
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?45fd59a2");
  # https://lore.kernel.org/linux-cve-announce/2024062008-CVE-2022-48759-d017@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9318d506");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-48759");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:H/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-2022-48759");

  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:"2024/06/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/23");
  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-5.10.0-74.16', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.16', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.16', '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');
}