Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013273)

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

include('compat.inc');

if (description)
{
  script_id(308011);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-54224");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013273)");

  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-2026-013273 advisory.

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

    btrfs: fix lockdep splat and potential deadlock after failure running delayed items

    When running delayed items we are holding a delayed node's mutex and then
    we will attempt to modify a subvolume btree to insert/update/delete the
    delayed items. However if have an error during the insertions for example,
    btrfs_insert_delayed_items() may return with a path that has locked extent
    buffers (a leaf at the very least), and then we attempt to release the
    delayed node at __btrfs_run_delayed_items(), which requires taking the
    delayed node's mutex, causing an ABBA type of deadlock. This was reported
    by syzbot and the lockdep splat is the following:

      WARNING: possible circular locking dependency detected
      6.5.0-rc7-syzkaller-00024-g93f5de5f648d #0 Not tainted
      ------------------------------------------------------
      syz-executor.2/13257 is trying to acquire lock:
      ffff88801835c0c0 (&delayed_node->mutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node+0x9a/0xaa0
    fs/btrfs/delayed-inode.c:256

      but task is already holding lock:
      ffff88802a5ab8e8 (btrfs-tree-00){++++}-{3:3}, at: __btrfs_tree_lock+0x3c/0x2a0 fs/btrfs/locking.c:198

      which lock already depends on the new lock.

      the existing dependency chain (in reverse order) is:

      -> #1 (btrfs-tree-00){++++}-{3:3}:
             __lock_release kernel/locking/lockdep.c:5475 [inline]
             lock_release+0x36f/0x9d0 kernel/locking/lockdep.c:5781
             up_write+0x79/0x580 kernel/locking/rwsem.c:1625
             btrfs_tree_unlock_rw fs/btrfs/locking.h:189 [inline]
             btrfs_unlock_up_safe+0x179/0x3b0 fs/btrfs/locking.c:239
             search_leaf fs/btrfs/ctree.c:1986 [inline]
             btrfs_search_slot+0x2511/0x2f80 fs/btrfs/ctree.c:2230
             btrfs_insert_empty_items+0x9c/0x180 fs/btrfs/ctree.c:4376
             btrfs_insert_delayed_item fs/btrfs/delayed-inode.c:746 [inline]
             btrfs_insert_delayed_items fs/btrfs/delayed-inode.c:824 [inline]
             __btrfs_commit_inode_delayed_items+0xd24/0x2410 fs/btrfs/delayed-inode.c:1111
             __btrfs_run_delayed_items+0x1db/0x430 fs/btrfs/delayed-inode.c:1153
             flush_space+0x269/0xe70 fs/btrfs/space-info.c:723
             btrfs_async_reclaim_metadata_space+0x106/0x350 fs/btrfs/space-info.c:1078
             process_one_work+0x92c/0x12c0 kernel/workqueue.c:2600
             worker_thread+0xa63/0x1210 kernel/workqueue.c:2751
             kthread+0x2b8/0x350 kernel/kthread.c:389
             ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
             ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

      -> #0 (&delayed_node->mutex){+.+.}-{3:3}:
             check_prev_add kernel/locking/lockdep.c:3142 [inline]
             check_prevs_add kernel/locking/lockdep.c:3261 [inline]
             validate_chain kernel/locking/lockdep.c:3876 [inline]
             __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5144
             lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761
             __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603
             __mutex_lock kernel/locking/mutex.c:747 [inline]
             mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
             __btrfs_release_delayed_node+0x9a/0xaa0 fs/btrfs/delayed-inode.c:256
             btrfs_release_delayed_node fs/btrfs/delayed-inode.c:281 [inline]
             __btrfs_run_delayed_items+0x2b5/0x430 fs/btrfs/delayed-inode.c:1156
             btrfs_commit_transaction+0x859/0x2ff0 fs/btrfs/transaction.c:2276
             btrfs_sync_file+0xf56/0x1330 fs/btrfs/file.c:1988
             vfs_fsync_range fs/sync.c:188 [inline]
             vfs_fsync fs/sync.c:202 [inline]
             do_fsync fs/sync.c:212 [inline]
             __do_sys_fsync fs/sync.c:220 [inline]
             __se_sys_fsync fs/sync.c:218 [inline]
             __x64_sys_fsync+0x196/0x1e0 fs/sync.c:218
             do_syscall_x64 arch/x86/entry/common.c:50 [inline]
             do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
             entry_SYSCALL_64_after_hwframe+0x63/0xcd

      other info that
    ---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-2026-013273
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?14bff790");
  # https://lore.kernel.org/linux-cve-announce/2025123028-CVE-2023-54224-9f68@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24148d44");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-54224");
  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-2023-54224");

  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-4.19.90-2409.6.0.0297.95', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.95', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.95', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.95', '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');
}