Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005107)

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

include('compat.inc');

if (description)
{
  script_id(296889);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/27");

  script_cve_id("CVE-2024-42077");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005107)");

  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-2026-005107 advisory.

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

    ocfs2: fix DIO failure due to insufficient transaction credits

    The code in ocfs2_dio_end_io_write() estimates number of necessary
    transaction credits using ocfs2_calc_extend_credits().  This however does
    not take into account that the IO could be arbitrarily large and can
    contain arbitrary number of extents.

    Extent tree manipulations do often extend the current transaction but not
    in all of the cases.  For example if we have only single block extents in
    the tree, ocfs2_mark_extent_written() will end up calling
    ocfs2_replace_extent_rec() all the time and we will never extend the
    current transaction and eventually exhaust all the transaction credits if
    the IO contains many single block extents.  Once that happens a
    WARN_ON(jbd2_handle_buffer_credits(handle) <= 0) is triggered in
    jbd2_journal_dirty_metadata() and subsequently OCFS2 aborts in response to
    this error.  This was actually triggered by one of our customers on a
    heavily fragmented OCFS2 filesystem.

    To fix the issue make sure the transaction always has enough credits for
    one extent insert before each call of ocfs2_mark_extent_written().

    Heming Zhao said:

    ------
    PANIC: Kernel panic - not syncing: OCFS2: (device dm-1): panic forced after error

    PID: xxx  TASK: xxxx  CPU: 5  COMMAND: SubmitThread-CA
      #0 machine_kexec at ffffffff8c069932
      #1 __crash_kexec at ffffffff8c1338fa
      #2 panic at ffffffff8c1d69b9
      #3 ocfs2_handle_error at ffffffffc0c86c0c [ocfs2]
      #4 __ocfs2_abort at ffffffffc0c88387 [ocfs2]
      #5 ocfs2_journal_dirty at ffffffffc0c51e98 [ocfs2]
      #6 ocfs2_split_extent at ffffffffc0c27ea3 [ocfs2]
      #7 ocfs2_change_extent_flag at ffffffffc0c28053 [ocfs2]
      #8 ocfs2_mark_extent_written at ffffffffc0c28347 [ocfs2]
      #9 ocfs2_dio_end_io_write at ffffffffc0c2bef9 [ocfs2]
    #10 ocfs2_dio_end_io at ffffffffc0c2c0f5 [ocfs2]
    #11 dio_complete at ffffffff8c2b9fa7
    #12 do_blockdev_direct_IO at ffffffff8c2bc09f
    #13 ocfs2_direct_IO at ffffffffc0c2b653 [ocfs2]
    #14 generic_file_direct_write at ffffffff8c1dcf14
    #15 __generic_file_write_iter at ffffffff8c1dd07b
    #16 ocfs2_file_write_iter at ffffffffc0c49f1f [ocfs2]
    #17 aio_write at ffffffff8c2cc72e
    #18 kmem_cache_alloc at ffffffff8c248dde
    #19 do_io_submit at ffffffff8c2ccada
    #20 do_syscall_64 at ffffffff8c004984
    #21 entry_SYSCALL_64_after_hwframe at ffffffff8c8000ba

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-2026-005107
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7a21aaed");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-42077");
  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-2024-42077");

  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:"2024/07/17");
  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');
}