Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005159)

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

include('compat.inc');

if (description)
{
  script_id(296968);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/27");

  script_cve_id("CVE-2024-56551");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005159)");

  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-2026-005159 advisory.

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

    drm/amdgpu: fix usage slab after free

    [  +0.000021] BUG: KASAN: slab-use-after-free in drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
    [  +0.000027] Read of size 8 at addr ffff8881b8605f88 by task amd_pci_unplug/2147

    [  +0.000023] CPU: 6 PID: 2147 Comm: amd_pci_unplug Not tainted 6.10.0+ #1
    [  +0.000016] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401
    12/03/2020
    [  +0.000016] Call Trace:
    [  +0.000008]  <TASK>
    [  +0.000009]  dump_stack_lvl+0x76/0xa0
    [  +0.000017]  print_report+0xce/0x5f0
    [  +0.000017]  ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
    [  +0.000019]  ? srso_return_thunk+0x5/0x5f
    [  +0.000015]  ? kasan_complete_mode_report_info+0x72/0x200
    [  +0.000016]  ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
    [  +0.000019]  kasan_report+0xbe/0x110
    [  +0.000015]  ? drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
    [  +0.000023]  __asan_report_load8_noabort+0x14/0x30
    [  +0.000014]  drm_sched_entity_flush+0x6cb/0x7a0 [gpu_sched]
    [  +0.000020]  ? srso_return_thunk+0x5/0x5f
    [  +0.000013]  ? __kasan_check_write+0x14/0x30
    [  +0.000016]  ? __pfx_drm_sched_entity_flush+0x10/0x10 [gpu_sched]
    [  +0.000020]  ? srso_return_thunk+0x5/0x5f
    [  +0.000013]  ? __kasan_check_write+0x14/0x30
    [  +0.000013]  ? srso_return_thunk+0x5/0x5f
    [  +0.000013]  ? enable_work+0x124/0x220
    [  +0.000015]  ? __pfx_enable_work+0x10/0x10
    [  +0.000013]  ? srso_return_thunk+0x5/0x5f
    [  +0.000014]  ? free_large_kmalloc+0x85/0xf0
    [  +0.000016]  drm_sched_entity_destroy+0x18/0x30 [gpu_sched]
    [  +0.000020]  amdgpu_vce_sw_fini+0x55/0x170 [amdgpu]
    [  +0.000735]  ? __kasan_check_read+0x11/0x20
    [  +0.000016]  vce_v4_0_sw_fini+0x80/0x110 [amdgpu]
    [  +0.000726]  amdgpu_device_fini_sw+0x331/0xfc0 [amdgpu]
    [  +0.000679]  ? mutex_unlock+0x80/0xe0
    [  +0.000017]  ? __pfx_amdgpu_device_fini_sw+0x10/0x10 [amdgpu]
    [  +0.000662]  ? srso_return_thunk+0x5/0x5f
    [  +0.000014]  ? __kasan_check_write+0x14/0x30
    [  +0.000013]  ? srso_return_thunk+0x5/0x5f
    [  +0.000013]  ? mutex_unlock+0x80/0xe0
    [  +0.000016]  amdgpu_driver_release_kms+0x16/0x80 [amdgpu]
    [  +0.000663]  drm_minor_release+0xc9/0x140 [drm]
    [  +0.000081]  drm_release+0x1fd/0x390 [drm]
    [  +0.000082]  __fput+0x36c/0xad0
    [  +0.000018]  __fput_sync+0x3c/0x50
    [  +0.000014]  __x64_sys_close+0x7d/0xe0
    [  +0.000014]  x64_sys_call+0x1bc6/0x2680
    [  +0.000014]  do_syscall_64+0x70/0x130
    [  +0.000014]  ? srso_return_thunk+0x5/0x5f
    [  +0.000014]  ? irqentry_exit_to_user_mode+0x60/0x190
    [  +0.000015]  ? srso_return_thunk+0x5/0x5f
    [  +0.000014]  ? irqentry_exit+0x43/0x50
    [  +0.000012]  ? srso_return_thunk+0x5/0x5f
    [  +0.000013]  ? exc_page_fault+0x7c/0x110
    [  +0.000015]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
    [  +0.000014] RIP: 0033:0x7ffff7b14f67
    [  +0.000013] Code: ff e8 0d 16 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00
    00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 73 ba f7 ff
    [  +0.000026] RSP: 002b:00007fffffffe378 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
    [  +0.000019] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffff7b14f67
    [  +0.000014] RDX: 0000000000000000 RSI: 00007ffff7f6f47a RDI: 0000000000000003
    [  +0.000014] RBP: 00007fffffffe3a0 R08: 0000555555569890 R09: 0000000000000000
    [  +0.000014] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffffffe5c8
    [  +0.000013] R13: 00005555555552a9 R14: 0000555555557d48 R15: 00007ffff7ffd040
    [  +0.000020]  </TASK>

    [  +0.000016] Allocated by task 383 on cpu 7 at 26.880319s:
    [  +0.000014]  kasan_save_stack+0x28/0x60
    [  +0.000008]  kasan_save_track+0x18/0x70
    [  +0.000007]  kasan_save_alloc_info+0x38/0x60
    [  +0.000007]  __kasan_kmalloc+0xc1/0xd0
    [  +0.000007]  kmalloc_trace_noprof+0x180/0x380
    [  +0.000007]  drm_sched_init+0x411/0xec0 [gpu_sched]
    [  +0.000012]  amdgpu_device_init+0x695f/0xa610 [amdgpu]
    [  +0.000658]  amdgpu_driver_load_kms+0x1a/0x120 [amdgpu]
    [  +0.000662]  amdgpu_pci_p
    ---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-2026-005159
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c72bec9a");
  # https://lore.kernel.org/linux-cve-announce/2024122709-CVE-2024-56551-4ad2@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9c83ce1c");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-56551");
  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-2024-56551");

  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:"2024/12/27");
  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');
}