Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013194)

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

include('compat.inc');

if (description)
{
  script_id(307906);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2022-49985");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013194)");

  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-2026-013194 advisory.

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

    bpf: Don't use tnum_range on array range checking for poke descriptors

    Hsin-Wei reported a KASAN splat triggered by their BPF runtime fuzzer which
    is based on a customized syzkaller:

      BUG: KASAN: slab-out-of-bounds in bpf_int_jit_compile+0x1257/0x13f0
      Read of size 8 at addr ffff888004e90b58 by task syz-executor.0/1489
      CPU: 1 PID: 1489 Comm: syz-executor.0 Not tainted 5.19.0 #1
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
      1.13.0-1ubuntu1.1 04/01/2014
      Call Trace:
       <TASK>
       dump_stack_lvl+0x9c/0xc9
       print_address_description.constprop.0+0x1f/0x1f0
       ? bpf_int_jit_compile+0x1257/0x13f0
       kasan_report.cold+0xeb/0x197
       ? kvmalloc_node+0x170/0x200
       ? bpf_int_jit_compile+0x1257/0x13f0
       bpf_int_jit_compile+0x1257/0x13f0
       ? arch_prepare_bpf_dispatcher+0xd0/0xd0
       ? rcu_read_lock_sched_held+0x43/0x70
       bpf_prog_select_runtime+0x3e8/0x640
       ? bpf_obj_name_cpy+0x149/0x1b0
       bpf_prog_load+0x102f/0x2220
       ? __bpf_prog_put.constprop.0+0x220/0x220
       ? find_held_lock+0x2c/0x110
       ? __might_fault+0xd6/0x180
       ? lock_downgrade+0x6e0/0x6e0
       ? lock_is_held_type+0xa6/0x120
       ? __might_fault+0x147/0x180
       __sys_bpf+0x137b/0x6070
       ? bpf_perf_link_attach+0x530/0x530
       ? new_sync_read+0x600/0x600
       ? __fget_files+0x255/0x450
       ? lock_downgrade+0x6e0/0x6e0
       ? fput+0x30/0x1a0
       ? ksys_write+0x1a8/0x260
       __x64_sys_bpf+0x7a/0xc0
       ? syscall_enter_from_user_mode+0x21/0x70
       do_syscall_64+0x3b/0x90
       entry_SYSCALL_64_after_hwframe+0x63/0xcd
      RIP: 0033:0x7f917c4e2c2d

    The problem here is that a range of tnum_range(0, map->max_entries - 1) has
    limited ability to represent the concrete tight range with the tnum as the
    set of resulting states from value + mask can result in a superset of the
    actual intended range, and as such a tnum_in(range, reg->var_off) check may
    yield true when it shouldn't, for example tnum_range(0, 2) would result in
    00XX -> v = 0000, m = 0011 such that the intended set of {0, 1, 2} is here
    represented by a less precise superset of {0, 1, 2, 3}. As the register is
    known const scalar, really just use the concrete reg->var_off.value for the
    upper index check.

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-2026-013194
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f62c595d");
  # https://lore.kernel.org/linux-cve-announce/2025061822-CVE-2022-49985-3e41@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd1d15c1");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49985");
  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: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:H/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-2022-49985");

  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:"2026/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/21");

  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:"^20.1070e([^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 && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.006.1', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.006.1', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.006.1', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.006.1', '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');
}