Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005647)

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

include('compat.inc');

if (description)
{
  script_id(300683);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/04");

  script_cve_id("CVE-2025-38035");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005647)");

  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-2026-005647 advisory.

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

    nvmet-tcp: don't restore null sk_state_change

    queue->state_change is set as part of nvmet_tcp_set_queue_sock(), but if
    the TCP connection isn't established when nvmet_tcp_set_queue_sock() is
    called then queue->state_change isn't set and sock->sk->sk_state_change
    isn't replaced.

    As such we don't need to restore sock->sk->sk_state_change if
    queue->state_change is NULL.

    This avoids NULL pointer dereferences such as this:

    [  286.462026][    C0] BUG: kernel NULL pointer dereference, address: 0000000000000000
    [  286.462814][    C0] #PF: supervisor instruction fetch in kernel mode
    [  286.463796][    C0] #PF: error_code(0x0010) - not-present page
    [  286.464392][    C0] PGD 8000000140620067 P4D 8000000140620067 PUD 114201067 PMD 0
    [  286.465086][    C0] Oops: Oops: 0010 [#1] SMP KASAN PTI
    [  286.465559][    C0] CPU: 0 UID: 0 PID: 1628 Comm: nvme Not tainted 6.15.0-rc2+ #11 PREEMPT(voluntary)
    [  286.466393][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41
    04/01/2014
    [  286.467147][    C0] RIP: 0010:0x0
    [  286.467420][    C0] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
    [  286.467977][    C0] RSP: 0018:ffff8883ae008580 EFLAGS: 00010246
    [  286.468425][    C0] RAX: 0000000000000000 RBX: ffff88813fd34100 RCX: ffffffffa386cc43
    [  286.469019][    C0] RDX: 1ffff11027fa68b6 RSI: 0000000000000008 RDI: ffff88813fd34100
    [  286.469545][    C0] RBP: ffff88813fd34160 R08: 0000000000000000 R09: ffffed1027fa682c
    [  286.470072][    C0] R10: ffff88813fd34167 R11: 0000000000000000 R12: ffff88813fd344c3
    [  286.470585][    C0] R13: ffff88813fd34112 R14: ffff88813fd34aec R15: ffff888132cdd268
    [  286.471070][    C0] FS:  00007fe3c04c7d80(0000) GS:ffff88840743f000(0000) knlGS:0000000000000000
    [  286.471644][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  286.472543][    C0] CR2: ffffffffffffffd6 CR3: 000000012daca000 CR4: 00000000000006f0
    [  286.473500][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  286.474467][    C0] DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7: 0000000000000400
    [  286.475453][    C0] Call Trace:
    [  286.476102][    C0]  <IRQ>
    [  286.476719][    C0]  tcp_fin+0x2bb/0x440
    [  286.477429][    C0]  tcp_data_queue+0x190f/0x4e60
    [  286.478174][    C0]  ? __build_skb_around+0x234/0x330
    [  286.478940][    C0]  ? rcu_is_watching+0x11/0xb0
    [  286.479659][    C0]  ? __pfx_tcp_data_queue+0x10/0x10
    [  286.480431][    C0]  ? tcp_try_undo_loss+0x640/0x6c0
    [  286.481196][    C0]  ? seqcount_lockdep_reader_access.constprop.0+0x82/0x90
    [  286.482046][    C0]  ? kvm_clock_get_cycles+0x14/0x30
    [  286.482769][    C0]  ? ktime_get+0x66/0x150
    [  286.483433][    C0]  ? rcu_is_watching+0x11/0xb0
    [  286.484146][    C0]  tcp_rcv_established+0x6e4/0x2050
    [  286.484857][    C0]  ? rcu_is_watching+0x11/0xb0
    [  286.485523][    C0]  ? ipv4_dst_check+0x160/0x2b0
    [  286.486203][    C0]  ? __pfx_tcp_rcv_established+0x10/0x10
    [  286.486917][    C0]  ? lock_release+0x217/0x2c0
    [  286.487595][    C0]  tcp_v4_do_rcv+0x4d6/0x9b0
    [  286.488279][    C0]  tcp_v4_rcv+0x2af8/0x3e30
    [  286.488904][    C0]  ? raw_local_deliver+0x51b/0xad0
    [  286.489551][    C0]  ? rcu_is_watching+0x11/0xb0
    [  286.490198][    C0]  ? __pfx_tcp_v4_rcv+0x10/0x10
    [  286.490813][    C0]  ? __pfx_raw_local_deliver+0x10/0x10
    [  286.491487][    C0]  ? __pfx_nf_confirm+0x10/0x10 [nf_conntrack]
    [  286.492275][    C0]  ? rcu_is_watching+0x11/0xb0
    [  286.492900][    C0]  ip_protocol_deliver_rcu+0x8f/0x370
    [  286.493579][    C0]  ip_local_deliver_finish+0x297/0x420
    [  286.494268][    C0]  ip_local_deliver+0x168/0x430
    [  286.494867][    C0]  ? __pfx_ip_local_deliver+0x10/0x10
    [  286.495498][    C0]  ? __pfx_ip_local_deliver_finish+0x10/0x10
    [  286.496204][    C0]  ? ip_rcv_finish_core+0x19a/0x1f20
    [  286.496806][    C0]  ? lock_release+0x217/0x2c0
    [  286.497414][    C0]  ip_rcv+0x455/0x6e0
    [  286.497945][    C0]  ? __pfx_ip_rcv+0x10/0x10
    [
    ---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-2026-005647
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9743e7c1");
  # https://lore.kernel.org/linux-cve-announce/2025061826-CVE-2025-38035-db28@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c2905ba5");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2025-38035");
  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-2025-38035");

  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:"2025/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/03");
  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:"^20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', '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');
}