Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005484)

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

include('compat.inc');

if (description)
{
  script_id(300564);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/04");

  script_cve_id("CVE-2023-53192");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005484)");

  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-2026-005484 advisory.

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

    vxlan: Fix nexthop hash size

    The nexthop code expects a 31 bit hash, such as what is returned by
    fib_multipath_hash() and rt6_multipath_hash(). Passing the 32 bit hash
    returned by skb_get_hash() can lead to problems related to the fact that
    'int hash' is a negative number when the MSB is set.

    In the case of hash threshold nexthop groups, nexthop_select_path_hthr()
    will disproportionately select the first nexthop group entry. In the case
    of resilient nexthop groups, nexthop_select_path_res() may do an out of
    bounds access in nh_buckets[], for example:
        hash = -912054133
        num_nh_buckets = 2
        bucket_index = 65535

    which leads to the following panic:

    BUG: unable to handle page fault for address: ffffc900025910c8
    PGD 100000067 P4D 100000067 PUD 10026b067 PMD 0
    Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI
    CPU: 4 PID: 856 Comm: kworker/4:3 Not tainted 6.5.0-rc2+ #34
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
    Workqueue: ipv6_addrconf addrconf_dad_work
    RIP: 0010:nexthop_select_path+0x197/0xbf0
    Code: c1 e4 05 be 08 00 00 00 4c 8b 35 a4 14 7e 01 4e 8d 6c 25 00 4a 8d 7c 25 08 48 01 dd e8 c2 25 15 ff
    49 8d 7d 08 e8 39 13 15 ff <4d> 89 75 08 48 89 ef e8 7d 12 15 ff 48 8b 5d 00 e8 14 55 2f 00 85
    RSP: 0018:ffff88810c36f260 EFLAGS: 00010246
    RAX: 0000000000000000 RBX: 00000000002000c0 RCX: ffffffffaf02dd77
    RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffc900025910c8
    RBP: ffffc900025910c0 R08: 0000000000000001 R09: fffff520004b2219
    R10: ffffc900025910cf R11: 31392d2068736168 R12: 00000000002000c0
    R13: ffffc900025910c0 R14: 00000000fffef608 R15: ffff88811840e900
    FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: ffffc900025910c8 CR3: 0000000129d00000 CR4: 0000000000750ee0
    PKRU: 55555554
    Call Trace:
     <TASK>
     ? __die+0x23/0x70
     ? page_fault_oops+0x1ee/0x5c0
     ? __pfx_is_prefetch.constprop.0+0x10/0x10
     ? __pfx_page_fault_oops+0x10/0x10
     ? search_bpf_extables+0xfe/0x1c0
     ? fixup_exception+0x3b/0x470
     ? exc_page_fault+0xf6/0x110
     ? asm_exc_page_fault+0x26/0x30
     ? nexthop_select_path+0x197/0xbf0
     ? nexthop_select_path+0x197/0xbf0
     ? lock_is_held_type+0xe7/0x140
     vxlan_xmit+0x5b2/0x2340
     ? __lock_acquire+0x92b/0x3370
     ? __pfx_vxlan_xmit+0x10/0x10
     ? __pfx___lock_acquire+0x10/0x10
     ? __pfx_register_lock_class+0x10/0x10
     ? skb_network_protocol+0xce/0x2d0
     ? dev_hard_start_xmit+0xca/0x350
     ? __pfx_vxlan_xmit+0x10/0x10
     dev_hard_start_xmit+0xca/0x350
     __dev_queue_xmit+0x513/0x1e20
     ? __pfx___dev_queue_xmit+0x10/0x10
     ? __pfx_lock_release+0x10/0x10
     ? mark_held_locks+0x44/0x90
     ? skb_push+0x4c/0x80
     ? eth_header+0x81/0xe0
     ? __pfx_eth_header+0x10/0x10
     ? neigh_resolve_output+0x215/0x310
     ? ip6_finish_output2+0x2ba/0xc90
     ip6_finish_output2+0x2ba/0xc90
     ? lock_release+0x236/0x3e0
     ? ip6_mtu+0xbb/0x240
     ? __pfx_ip6_finish_output2+0x10/0x10
     ? find_held_lock+0x83/0xa0
     ? lock_is_held_type+0xe7/0x140
     ip6_finish_output+0x1ee/0x780
     ip6_output+0x138/0x460
     ? __pfx_ip6_output+0x10/0x10
     ? __pfx___lock_acquire+0x10/0x10
     ? __pfx_ip6_finish_output+0x10/0x10
     NF_HOOK.constprop.0+0xc0/0x420
     ? __pfx_NF_HOOK.constprop.0+0x10/0x10
     ? ndisc_send_skb+0x2c0/0x960
     ? __pfx_lock_release+0x10/0x10
     ? __local_bh_enable_ip+0x93/0x110
     ? lock_is_held_type+0xe7/0x140
     ndisc_send_skb+0x4be/0x960
     ? __pfx_ndisc_send_skb+0x10/0x10
     ? mark_held_locks+0x65/0x90
     ? find_held_lock+0x83/0xa0
     ndisc_send_ns+0xb0/0x110
     ? __pfx_ndisc_send_ns+0x10/0x10
     addrconf_dad_work+0x631/0x8e0
     ? lock_acquire+0x180/0x3f0
     ? __pfx_addrconf_dad_work+0x10/0x10
     ? mark_held_locks+0x24/0x90
     process_one_work+0x582/0x9c0
     ? __pfx_process_one_work+0x10/0x10
     ? __pfx_do_raw_spin_lock+0x10/0x10
     ? mark_held_locks+0x24/0x90
     worker_thread+0x93/0x630
     ? __kthread_parkme+0xdc/0x100
     ? __pfx_worker_thread+0x10/0x10
     kthread+0x1a5/0x1e0
     ? __pfx_kthread+0x10/0x10
     ret_from_fork+0x34/0x60

    ---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-2026-005484
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a75e9666");
  # https://lore.kernel.org/linux-cve-announce/2025091558-CVE-2023-53192-5ca6@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f0daccb7");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53192");
  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:C/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:H/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-2023-53192");

  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:"2026/03/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/04");

  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-5.10.0-79.7', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', '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');
}