Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-011360)

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

include('compat.inc');

if (description)
{
  script_id(308996);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/22");

  script_cve_id("CVE-2025-40317");

  script_name(english:"Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-011360)");

  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-2026-011360 advisory.

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

    regmap: slimbus: fix bus_context pointer in regmap init calls

    Commit 4e65bda8273c (ASoC: wcd934x: fix error handling in
    wcd934x_codec_parse_data()) revealed the problem in the slimbus regmap.
    That commit breaks audio playback, for instance, on sdm845 Thundercomm
    Dragonboard 845c board:

     Unable to handle kernel paging request at virtual address ffff8000847cbad4
     ...
     CPU: 5 UID: 0 PID: 776 Comm: aplay Not tainted 6.18.0-rc1-00028-g7ea30958b305 #11 PREEMPT
     Hardware name: Thundercomm Dragonboard 845c (DT)
     ...
     Call trace:
      slim_xfer_msg+0x24/0x1ac [slimbus] (P)
      slim_read+0x48/0x74 [slimbus]
      regmap_slimbus_read+0x18/0x24 [regmap_slimbus]
      _regmap_raw_read+0xe8/0x174
      _regmap_bus_read+0x44/0x80
      _regmap_read+0x60/0xd8
      _regmap_update_bits+0xf4/0x140
      _regmap_select_page+0xa8/0x124
      _regmap_raw_write_impl+0x3b8/0x65c
      _regmap_bus_raw_write+0x60/0x80
      _regmap_write+0x58/0xc0
      regmap_write+0x4c/0x80
      wcd934x_hw_params+0x494/0x8b8 [snd_soc_wcd934x]
      snd_soc_dai_hw_params+0x3c/0x7c [snd_soc_core]
      __soc_pcm_hw_params+0x22c/0x634 [snd_soc_core]
      dpcm_be_dai_hw_params+0x1d4/0x38c [snd_soc_core]
      dpcm_fe_dai_hw_params+0x9c/0x17c [snd_soc_core]
      snd_pcm_hw_params+0x124/0x464 [snd_pcm]
      snd_pcm_common_ioctl+0x110c/0x1820 [snd_pcm]
      snd_pcm_ioctl+0x34/0x4c [snd_pcm]
      __arm64_sys_ioctl+0xac/0x104
      invoke_syscall+0x48/0x104
      el0_svc_common.constprop.0+0x40/0xe0
      do_el0_svc+0x1c/0x28
      el0_svc+0x34/0xec
      el0t_64_sync_handler+0xa0/0xf0
      el0t_64_sync+0x198/0x19c

    The __devm_regmap_init_slimbus() started to be used instead of
    __regmap_init_slimbus() after the commit mentioned above and turns out
    the incorrect bus_context pointer (3rd argument) was used in
    __devm_regmap_init_slimbus(). It should be just slimbus (which is equal
    to &slimbus->dev). Correct it. The wcd934x codec seems to be the only or
    the first user of devm_regmap_init_slimbus() but we should fix it till
    the point where __devm_regmap_init_slimbus() was introduced therefore
    two Fixes tags.

    While at this, also correct the same argument in __regmap_init_slimbus().

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-2026-011360
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2453b505");
  # https://lore.kernel.org/linux-cve-announce/2025120822-CVE-2025-40317-5237@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?86e88d6b");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2025-40317");
  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-2025-40317");

  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:"2025/12/08");
  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:"^20.1050e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e / 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': '1050e',
    'pkgs': [
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.10', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.10', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.10', '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');
}