Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013587)

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

include('compat.inc');

if (description)
{
  script_id(309389);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/26");

  script_cve_id("CVE-2022-50705");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013587)");

  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-2026-013587 advisory.

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

    io_uring/rw: defer fsnotify calls to task context

    We can't call these off the kiocb completion as that might be off
    soft/hard irq context. Defer the calls to when we process the
    task_work for this request. That avoids valid complaints like:

    stack backtrace:
    CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.0.0-rc6-syzkaller-00321-g105a36f3694e #0
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
    Call Trace:
     <IRQ>
     __dump_stack lib/dump_stack.c:88 [inline]
     dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
     print_usage_bug kernel/locking/lockdep.c:3961 [inline]
     valid_state kernel/locking/lockdep.c:3973 [inline]
     mark_lock_irq kernel/locking/lockdep.c:4176 [inline]
     mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4632
     mark_lock kernel/locking/lockdep.c:4596 [inline]
     mark_usage kernel/locking/lockdep.c:4527 [inline]
     __lock_acquire+0x11d9/0x56d0 kernel/locking/lockdep.c:5007
     lock_acquire kernel/locking/lockdep.c:5666 [inline]
     lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
     __fs_reclaim_acquire mm/page_alloc.c:4674 [inline]
     fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4688
     might_alloc include/linux/sched/mm.h:271 [inline]
     slab_pre_alloc_hook mm/slab.h:700 [inline]
     slab_alloc mm/slab.c:3278 [inline]
     __kmem_cache_alloc_lru mm/slab.c:3471 [inline]
     kmem_cache_alloc+0x39/0x520 mm/slab.c:3491
     fanotify_alloc_fid_event fs/notify/fanotify/fanotify.c:580 [inline]
     fanotify_alloc_event fs/notify/fanotify/fanotify.c:813 [inline]
     fanotify_handle_event+0x1130/0x3f40 fs/notify/fanotify/fanotify.c:948
     send_to_group fs/notify/fsnotify.c:360 [inline]
     fsnotify+0xafb/0x1680 fs/notify/fsnotify.c:570
     __fsnotify_parent+0x62f/0xa60 fs/notify/fsnotify.c:230
     fsnotify_parent include/linux/fsnotify.h:77 [inline]
     fsnotify_file include/linux/fsnotify.h:99 [inline]
     fsnotify_access include/linux/fsnotify.h:309 [inline]
     __io_complete_rw_common+0x485/0x720 io_uring/rw.c:195
     io_complete_rw+0x1a/0x1f0 io_uring/rw.c:228
     iomap_dio_complete_work fs/iomap/direct-io.c:144 [inline]
     iomap_dio_bio_end_io+0x438/0x5e0 fs/iomap/direct-io.c:178
     bio_endio+0x5f9/0x780 block/bio.c:1564
     req_bio_endio block/blk-mq.c:695 [inline]
     blk_update_request+0x3fc/0x1300 block/blk-mq.c:825
     scsi_end_request+0x7a/0x9a0 drivers/scsi/scsi_lib.c:541
     scsi_io_completion+0x173/0x1f70 drivers/scsi/scsi_lib.c:971
     scsi_complete+0x122/0x3b0 drivers/scsi/scsi_lib.c:1438
     blk_complete_reqs+0xad/0xe0 block/blk-mq.c:1022
     __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
     invoke_softirq kernel/softirq.c:445 [inline]
     __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
     irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
     common_interrupt+0xa9/0xc0 arch/x86/kernel/irq.c:240

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-2026-013587
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?625b21f4");
  # https://lore.kernel.org/linux-cve-announce/2025122419-CVE-2022-50705-8196@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0ec34703");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50705");
  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-2022-50705");

  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:"2023/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/22");

  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:"^20.1060a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060a / 20.1070a', '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 && 'loongarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1060a',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1060a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1060a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-38', 'sp':'1070a', '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');
}