Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986744)

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

include('compat.inc');

if (description)
{
  script_id(268198);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2022-48634");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986744)");

  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-2025-986744 advisory.

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

    drm/gma500: Fix BUG: sleeping function called from invalid context errors

    gma_crtc_page_flip() was holding the event_lock spinlock while calling
    crtc_funcs->mode_set_base() which takes ww_mutex.

    The only reason to hold event_lock is to clear gma_crtc->page_flip_event
    on mode_set_base() errors.

    Instead unlock it after setting gma_crtc->page_flip_event and on
    errors re-take the lock and clear gma_crtc->page_flip_event it
    it is still set.

    This fixes the following WARN/stacktrace:

    [  512.122953] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:870
    [  512.123004] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1253, name: gnome-shell
    [  512.123031] preempt_count: 1, expected: 0
    [  512.123048] RCU nest depth: 0, expected: 0
    [  512.123066] INFO: lockdep is turned off.
    [  512.123080] irq event stamp: 0
    [  512.123094] hardirqs last  enabled at (0): [<0000000000000000>] 0x0
    [  512.123134] hardirqs last disabled at (0): [<ffffffff8d0ec28c>] copy_process+0x9fc/0x1de0
    [  512.123176] softirqs last  enabled at (0): [<ffffffff8d0ec28c>] copy_process+0x9fc/0x1de0
    [  512.123207] softirqs last disabled at (0): [<0000000000000000>] 0x0
    [  512.123233] Preemption disabled at:
    [  512.123241] [<0000000000000000>] 0x0
    [  512.123275] CPU: 3 PID: 1253 Comm: gnome-shell Tainted: G        W         5.19.0+ #1
    [  512.123304] Hardware name: Packard Bell dot s/SJE01_CT, BIOS V1.10 07/23/2013
    [  512.123323] Call Trace:
    [  512.123346]  <TASK>
    [  512.123370]  dump_stack_lvl+0x5b/0x77
    [  512.123412]  __might_resched.cold+0xff/0x13a
    [  512.123458]  ww_mutex_lock+0x1e/0xa0
    [  512.123495]  psb_gem_pin+0x2c/0x150 [gma500_gfx]
    [  512.123601]  gma_pipe_set_base+0x76/0x240 [gma500_gfx]
    [  512.123708]  gma_crtc_page_flip+0x95/0x130 [gma500_gfx]
    [  512.123808]  drm_mode_page_flip_ioctl+0x57d/0x5d0
    [  512.123897]  ? drm_mode_cursor2_ioctl+0x10/0x10
    [  512.123936]  drm_ioctl_kernel+0xa1/0x150
    [  512.123984]  drm_ioctl+0x21f/0x420
    [  512.124025]  ? drm_mode_cursor2_ioctl+0x10/0x10
    [  512.124070]  ? rcu_read_lock_bh_held+0xb/0x60
    [  512.124104]  ? lock_release+0x1ef/0x2d0
    [  512.124161]  __x64_sys_ioctl+0x8d/0xd0
    [  512.124203]  do_syscall_64+0x58/0x80
    [  512.124239]  ? do_syscall_64+0x67/0x80
    [  512.124267]  ? trace_hardirqs_on_prepare+0x55/0xe0
    [  512.124300]  ? do_syscall_64+0x67/0x80
    [  512.124340]  ? rcu_read_lock_sched_held+0x10/0x80
    [  512.124377]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
    [  512.124411] RIP: 0033:0x7fcc4a70740f
    [  512.124442] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44
    24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 48 2b 04 25 28 00
    00
    [  512.124470] RSP: 002b:00007ffda73f5390 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
    [  512.124503] RAX: ffffffffffffffda RBX: 000055cc9e474500 RCX: 00007fcc4a70740f
    [  512.124524] RDX: 00007ffda73f5420 RSI: 00000000c01864b0 RDI: 0000000000000009
    [  512.124544] RBP: 00007ffda73f5420 R08: 000055cc9c0b0cb0 R09: 0000000000000034
    [  512.124564] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c01864b0
    [  512.124584] R13: 0000000000000009 R14: 000055cc9df484d0 R15: 000055cc9af5d0c0
    [  512.124647]  </TASK>

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-2025-986744
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?069ad520");
  # https://lore.kernel.org/linux-cve-announce/2024042854-CVE-2022-48634-af99@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a182e398");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-48634");
  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:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-48634");

  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:"2025/09/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/07");

  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:"^20.1070e([^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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-74.16', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.16', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.16', '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');
}