Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005646)

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

include('compat.inc');

if (description)
{
  script_id(300336);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/03");

  script_cve_id("CVE-2023-53204");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005646)");

  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-2026-005646 advisory.

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

    af_unix: Fix data-races around user->unix_inflight.

    user->unix_inflight is changed under spin_lock(unix_gc_lock),
    but too_many_unix_fds() reads it locklessly.

    Let's annotate the write/read accesses to user->unix_inflight.

    BUG: KCSAN: data-race in unix_attach_fds / unix_inflight

    write to 0xffffffff8546f2d0 of 8 bytes by task 44798 on cpu 1:
     unix_inflight+0x157/0x180 net/unix/scm.c:66
     unix_attach_fds+0x147/0x1e0 net/unix/scm.c:123
     unix_scm_to_skb net/unix/af_unix.c:1827 [inline]
     unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950
     unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]
     unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292
     sock_sendmsg_nosec net/socket.c:725 [inline]
     sock_sendmsg+0x148/0x160 net/socket.c:748
     ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494
     ___sys_sendmsg+0xc6/0x140 net/socket.c:2548
     __sys_sendmsg+0x94/0x140 net/socket.c:2577
     __do_sys_sendmsg net/socket.c:2586 [inline]
     __se_sys_sendmsg net/socket.c:2584 [inline]
     __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584
     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
     do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
     entry_SYSCALL_64_after_hwframe+0x6e/0xd8

    read to 0xffffffff8546f2d0 of 8 bytes by task 44814 on cpu 0:
     too_many_unix_fds net/unix/scm.c:101 [inline]
     unix_attach_fds+0x54/0x1e0 net/unix/scm.c:110
     unix_scm_to_skb net/unix/af_unix.c:1827 [inline]
     unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950
     unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]
     unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292
     sock_sendmsg_nosec net/socket.c:725 [inline]
     sock_sendmsg+0x148/0x160 net/socket.c:748
     ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494
     ___sys_sendmsg+0xc6/0x140 net/socket.c:2548
     __sys_sendmsg+0x94/0x140 net/socket.c:2577
     __do_sys_sendmsg net/socket.c:2586 [inline]
     __se_sys_sendmsg net/socket.c:2584 [inline]
     __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584
     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
     do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
     entry_SYSCALL_64_after_hwframe+0x6e/0xd8

    value changed: 0x000000000000000c -> 0x000000000000000d

    Reported by Kernel Concurrency Sanitizer on:
    CPU: 0 PID: 44814 Comm: systemd-coredum Not tainted 6.4.0-11989-g6843306689af #6
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org
    04/01/2014

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-2026-005646
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?794e7763");
  # https://lore.kernel.org/linux-cve-announce/2025091509-CVE-2023-53204-3e15@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0cb10fd2");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53204");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:H/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-2023-53204");

  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:"2021/09/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/03");

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


var constraints = [
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.7', '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_NOTE,
      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');
}