Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005188)

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

include('compat.inc');

if (description)
{
  script_id(296944);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/27");

  script_cve_id("CVE-2024-56650");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005188)");

  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-2026-005188 advisory.

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

    netfilter: x_tables: fix LED ID check in led_tg_check()

    Syzbot has reported the following BUG detected by KASAN:

    BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70
    Read of size 1 at addr ffff8881022da0c8 by task repro/5879
    ...
    Call Trace:
     <TASK>
     dump_stack_lvl+0x241/0x360
     ? __pfx_dump_stack_lvl+0x10/0x10
     ? __pfx__printk+0x10/0x10
     ? _printk+0xd5/0x120
     ? __virt_addr_valid+0x183/0x530
     ? __virt_addr_valid+0x183/0x530
     print_report+0x169/0x550
     ? __virt_addr_valid+0x183/0x530
     ? __virt_addr_valid+0x183/0x530
     ? __virt_addr_valid+0x45f/0x530
     ? __phys_addr+0xba/0x170
     ? strlen+0x58/0x70
     kasan_report+0x143/0x180
     ? strlen+0x58/0x70
     strlen+0x58/0x70
     kstrdup+0x20/0x80
     led_tg_check+0x18b/0x3c0
     xt_check_target+0x3bb/0xa40
     ? __pfx_xt_check_target+0x10/0x10
     ? stack_depot_save_flags+0x6e4/0x830
     ? nft_target_init+0x174/0xc30
     nft_target_init+0x82d/0xc30
     ? __pfx_nft_target_init+0x10/0x10
     ? nf_tables_newrule+0x1609/0x2980
     ? nf_tables_newrule+0x1609/0x2980
     ? rcu_is_watching+0x15/0xb0
     ? nf_tables_newrule+0x1609/0x2980
     ? nf_tables_newrule+0x1609/0x2980
     ? __kmalloc_noprof+0x21a/0x400
     nf_tables_newrule+0x1860/0x2980
     ? __pfx_nf_tables_newrule+0x10/0x10
     ? __nla_parse+0x40/0x60
     nfnetlink_rcv+0x14e5/0x2ab0
     ? __pfx_validate_chain+0x10/0x10
     ? __pfx_nfnetlink_rcv+0x10/0x10
     ? __lock_acquire+0x1384/0x2050
     ? netlink_deliver_tap+0x2e/0x1b0
     ? __pfx_lock_release+0x10/0x10
     ? netlink_deliver_tap+0x2e/0x1b0
     netlink_unicast+0x7f8/0x990
     ? __pfx_netlink_unicast+0x10/0x10
     ? __virt_addr_valid+0x183/0x530
     ? __check_object_size+0x48e/0x900
     netlink_sendmsg+0x8e4/0xcb0
     ? __pfx_netlink_sendmsg+0x10/0x10
     ? aa_sock_msg_perm+0x91/0x160
     ? __pfx_netlink_sendmsg+0x10/0x10
     __sock_sendmsg+0x223/0x270
     ____sys_sendmsg+0x52a/0x7e0
     ? __pfx_____sys_sendmsg+0x10/0x10
     __sys_sendmsg+0x292/0x380
     ? __pfx___sys_sendmsg+0x10/0x10
     ? lockdep_hardirqs_on_prepare+0x43d/0x780
     ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
     ? exc_page_fault+0x590/0x8c0
     ? do_syscall_64+0xb6/0x230
     do_syscall_64+0xf3/0x230
     entry_SYSCALL_64_after_hwframe+0x77/0x7f
    ...
     </TASK>

    Since an invalid (without '\0' byte at all) byte sequence may be passed
    from userspace, add an extra check to ensure that such a sequence is
    rejected as possible ID and so never passed to 'kstrdup()' and further.

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-2026-005188
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24724f2c");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-56650");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/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:H/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-2024-56650");

  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:"2023/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/27");

  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:"^20.1050e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e', '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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1050e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.47', 'sp':'1050e', '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');
}