Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013131)

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

include('compat.inc');

if (description)
{
  script_id(308031);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-54007");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013131)");

  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-2026-013131 advisory.

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

    vmci_host: fix a race condition in vmci_host_poll() causing GPF

    During fuzzing, a general protection fault is observed in
    vmci_host_poll().

    general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP
    KASAN
    KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
    RIP: 0010:__lock_acquire+0xf3/0x5e00 kernel/locking/lockdep.c:4926
    <- omitting registers ->
    Call Trace:
     <TASK>
     lock_acquire+0x1a4/0x4a0 kernel/locking/lockdep.c:5672
     __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
     _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162
     add_wait_queue+0x3d/0x260 kernel/sched/wait.c:22
     poll_wait include/linux/poll.h:49 [inline]
     vmci_host_poll+0xf8/0x2b0 drivers/misc/vmw_vmci/vmci_host.c:174
     vfs_poll include/linux/poll.h:88 [inline]
     do_pollfd fs/select.c:873 [inline]
     do_poll fs/select.c:921 [inline]
     do_sys_poll+0xc7c/0x1aa0 fs/select.c:1015
     __do_sys_ppoll fs/select.c:1121 [inline]
     __se_sys_ppoll+0x2cc/0x330 fs/select.c:1101
     do_syscall_x64 arch/x86/entry/common.c:51 [inline]
     do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82
     entry_SYSCALL_64_after_hwframe+0x46/0xb0

    Example thread interleaving that causes the general protection fault
    is as follows:

    CPU1 (vmci_host_poll)               CPU2 (vmci_host_do_init_context)
    -----                               -----
    // Read uninitialized context
    context = vmci_host_dev->context;
                                        // Initialize context
                                        vmci_host_dev->context = vmci_ctx_create();
                                        vmci_host_dev->ct_type = VMCIOBJ_CONTEXT;

    if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {
        // Dereferencing the wrong pointer
        poll_wait(..., &context->host_context);
    }

    In this scenario, vmci_host_poll() reads vmci_host_dev->context first,
    and then reads vmci_host_dev->ct_type to check that
    vmci_host_dev->context is initialized. However, since these two reads
    are not atomically executed, there is a chance of a race condition as
    described above.

    To fix this race condition, read vmci_host_dev->context after checking
    the value of vmci_host_dev->ct_type so that vmci_host_poll() always
    reads an initialized context.

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-2026-013131
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b9a6bd1b");
  # https://lore.kernel.org/linux-cve-announce/2025122429-CVE-2023-54007-89b1@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aa781e0d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-54007");
  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-2023-54007");

  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-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', '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_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');
}