Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013175)

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

include('compat.inc');

if (description)
{
  script_id(308041);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-54134");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013175)");

  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-2026-013175 advisory.

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

    autofs: fix memory leak of waitqueues in autofs_catatonic_mode

    Syzkaller reports a memory leak:

    BUG: memory leak
    unreferenced object 0xffff88810b279e00 (size 96):
      comm syz-executor399, pid 3631, jiffies 4294964921 (age 23.870s)
      hex dump (first 32 bytes):
        00 00 00 00 00 00 00 00 08 9e 27 0b 81 88 ff ff  ..........'.....
        08 9e 27 0b 81 88 ff ff 00 00 00 00 00 00 00 00  ..'.............
      backtrace:
        [<ffffffff814cfc90>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046
        [<ffffffff81bb75ca>] kmalloc include/linux/slab.h:576 [inline]
        [<ffffffff81bb75ca>] autofs_wait+0x3fa/0x9a0 fs/autofs/waitq.c:378
        [<ffffffff81bb88a7>] autofs_do_expire_multi+0xa7/0x3e0 fs/autofs/expire.c:593
        [<ffffffff81bb8c33>] autofs_expire_multi+0x53/0x80 fs/autofs/expire.c:619
        [<ffffffff81bb6972>] autofs_root_ioctl_unlocked+0x322/0x3b0 fs/autofs/root.c:897
        [<ffffffff81bb6a95>] autofs_root_ioctl+0x25/0x30 fs/autofs/root.c:910
        [<ffffffff81602a9c>] vfs_ioctl fs/ioctl.c:51 [inline]
        [<ffffffff81602a9c>] __do_sys_ioctl fs/ioctl.c:870 [inline]
        [<ffffffff81602a9c>] __se_sys_ioctl fs/ioctl.c:856 [inline]
        [<ffffffff81602a9c>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:856
        [<ffffffff84608225>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
        [<ffffffff84608225>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
        [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

    autofs_wait_queue structs should be freed if their wait_ctr becomes zero.
    Otherwise they will be lost.

    In this case an AUTOFS_IOC_EXPIRE_MULTI ioctl is done, then a new
    waitqueue struct is allocated in autofs_wait(), its initial wait_ctr
    equals 2. After that wait_event_killable() is interrupted (it returns
    -ERESTARTSYS), so that 'wq->name.name == NULL' condition may be not
    satisfied. Actually, this condition can be satisfied when
    autofs_wait_release() or autofs_catatonic_mode() is called and, what is
    also important, wait_ctr is decremented in those places. Upon the exit of
    autofs_wait(), wait_ctr is decremented to 1. Then the unmounting process
    begins: kill_sb calls autofs_catatonic_mode(), which should have freed the
    waitqueues, but it only decrements its usage counter to zero which is not
    a correct behaviour.

    edit:imk
    This description is of course not correct. The umount performed as a result
    of an expire is a umount of a mount that has been automounted, it's not the
    autofs mount itself. They happen independently, usually after everything
    mounted within the autofs file system has been expired away. If everything
    hasn't been expired away the automount daemon can still exit leaving mounts
    in place. But expires done in both cases will result in a notification that
    calls autofs_wait_release() with a result status. The problem case is the
    summary execution of of the automount daemon. In this case any waiting
    processes won't be woken up until either they are terminated or the mount
    is umounted.
    end edit: imk

    So in catatonic mode we should free waitqueues which counter becomes zero.

    edit: imk
    Initially I was concerned that the calling of autofs_wait_release() and
    autofs_catatonic_mode() was not mutually exclusive but that can't be the
    case (obviously) because the queue entry (or entries) is removed from the
    list when either of these two functions are called. Consequently the wait
    entry will be freed by only one of these functions or by the woken process
    in autofs_wait() depending on the order of the calls.
    end edit: imk

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-2026-013175
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d8cf061c");
  # https://lore.kernel.org/linux-cve-announce/2025122421-CVE-2023-54134-2972@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dd037902");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-54134");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:H/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-2023-54134");

  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:"2026/04/21");
  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:"^20.1070e([^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 && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2311.2.0', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2311.2.0', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2311.2.0', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2311.2.0', '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_NOTE,
      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');
}