Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989095)

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

include('compat.inc');

if (description)
{
  script_id(273288);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/05");

  script_cve_id("CVE-2022-49522");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989095)");

  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-2025-989095 advisory.

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

    mmc: jz4740: Apply DMA engine limits to maximum segment size

    Do what is done in other DMA-enabled MMC host drivers (cf. host/mmci.c) and
    limit the maximum segment size based on the DMA engine's capabilities. This
    is needed to avoid warnings like the following with CONFIG_DMA_API_DEBUG=y.

    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c
    DMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support
    [len=98304] [max=65536]
    CPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19
    Workqueue: kblockd blk_mq_run_work_fn
    Stack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac
            814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444
            00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62
            6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009
            805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000
            ...
    Call Trace:
    [<80107670>] show_stack+0x84/0x120
    [<80528cd8>] __warn+0xb8/0xec
    [<80528d78>] warn_slowpath_fmt+0x6c/0xb8
    [<8016f1d4>] debug_dma_map_sg+0x2f4/0x39c
    [<80169d4c>] __dma_map_sg_attrs+0xf0/0x118
    [<8016a27c>] dma_map_sg_attrs+0x14/0x28
    [<804f66b4>] jz4740_mmc_prepare_dma_data+0x74/0xa4
    [<804f6714>] jz4740_mmc_pre_request+0x30/0x54
    [<804f4ff4>] mmc_blk_mq_issue_rq+0x6e0/0x7bc
    [<804f5590>] mmc_mq_queue_rq+0x220/0x2d4
    [<8038b2c0>] blk_mq_dispatch_rq_list+0x480/0x664
    [<80391040>] blk_mq_do_dispatch_sched+0x2dc/0x370
    [<80391468>] __blk_mq_sched_dispatch_requests+0xec/0x164
    [<80391540>] blk_mq_sched_dispatch_requests+0x44/0x94
    [<80387900>] __blk_mq_run_hw_queue+0xb0/0xcc
    [<80134c14>] process_one_work+0x1b8/0x264
    [<80134ff8>] worker_thread+0x2ec/0x3b8
    [<8013b13c>] kthread+0x104/0x10c
    [<80101dcc>] ret_from_kernel_thread+0x14/0x1c

    ---[ end trace 0000000000000000 ]---

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-2025-989095
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?494189dd");
  # https://lore.kernel.org/linux-cve-announce/2025022611-CVE-2022-49522-ced4@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2a055a2d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49522");
  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-2022-49522");

  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:"2025/02/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/05");

  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) 2025 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 && 'loongarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', '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');
}