Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005450)

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

include('compat.inc');

if (description)
{
  script_id(300369);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/03");

  script_cve_id("CVE-2023-53441");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005450)");

  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-2026-005450 advisory.

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

    bpf: cpumap: Fix memory leak in cpu_map_update_elem

    Syzkaller reported a memory leak as follows:

    BUG: memory leak
    unreferenced object 0xff110001198ef748 (size 192):
      comm syz-executor.3, pid 17672, jiffies 4298118891 (age 9.906s)
      hex dump (first 32 bytes):
        00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........
        00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......
      backtrace:
        [<ffffffffadd28087>] __cpu_map_entry_alloc+0xf7/0xb00
        [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0
        [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520
        [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720
        [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90
        [<ffffffffb029cc80>] do_syscall_64+0x30/0x40
        [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

    BUG: memory leak
    unreferenced object 0xff110001198ef528 (size 192):
      comm syz-executor.3, pid 17672, jiffies 4298118891 (age 9.906s)
      hex dump (first 32 bytes):
        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      backtrace:
        [<ffffffffadd281f0>] __cpu_map_entry_alloc+0x260/0xb00
        [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0
        [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520
        [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720
        [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90
        [<ffffffffb029cc80>] do_syscall_64+0x30/0x40
        [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

    BUG: memory leak
    unreferenced object 0xff1100010fd93d68 (size 8):
      comm syz-executor.3, pid 17672, jiffies 4298118891 (age 9.906s)
      hex dump (first 8 bytes):
        00 00 00 00 00 00 00 00                          ........
      backtrace:
        [<ffffffffade5db3e>] kvmalloc_node+0x11e/0x170
        [<ffffffffadd28280>] __cpu_map_entry_alloc+0x2f0/0xb00
        [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0
        [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520
        [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720
        [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90
        [<ffffffffb029cc80>] do_syscall_64+0x30/0x40
        [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

    In the cpu_map_update_elem flow, when kthread_stop is called before
    calling the threadfn of rcpu->kthread, since the KTHREAD_SHOULD_STOP bit
    of kthread has been set by kthread_stop, the threadfn of rcpu->kthread
    will never be executed, and rcpu->refcnt will never be 0, which will
    lead to the allocated rcpu, rcpu->queue and rcpu->queue->queue cannot be
    released.

    Calling kthread_stop before executing kthread's threadfn will return
    -EINTR. We can complete the release of memory resources in this state.

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-2026-005450
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d3e152a0");
  # https://lore.kernel.org/linux-cve-announce/2025091859-CVE-2023-53441-0641@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8588f4cb");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53441");
  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-2023-53441");

  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:"2023/08/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/03");

  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-4.19.90-2601.1.0.0002', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2601.1.0.0002', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2601.1.0.0002', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2601.1.0.0002', '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');
}