Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005808)

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

include('compat.inc');

if (description)
{
  script_id(300376);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/03");

  script_cve_id("CVE-2022-49865");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2026-005808)");

  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-2026-005808 advisory.

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

    ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network

    When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved
    remained uninitialized, resulting in a 1-byte infoleak:

      BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841
       __netdev_start_xmit ./include/linux/netdevice.h:4841
       netdev_start_xmit ./include/linux/netdevice.h:4857
       xmit_one net/core/dev.c:3590
       dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606
       __dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256
       dev_queue_xmit ./include/linux/netdevice.h:3009
       __netlink_deliver_tap_skb net/netlink/af_netlink.c:307
       __netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325
       netlink_deliver_tap net/netlink/af_netlink.c:338
       __netlink_sendskb net/netlink/af_netlink.c:1263
       netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272
       netlink_unicast+0x56d/0xf50 net/netlink/af_netlink.c:1360
       nlmsg_unicast ./include/net/netlink.h:1061
       rtnl_unicast+0x5a/0x80 net/core/rtnetlink.c:758
       ip6addrlbl_get+0xfad/0x10f0 net/ipv6/addrlabel.c:628
       rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082
      ...
      Uninit was created at:
       slab_post_alloc_hook+0x118/0xb00 mm/slab.h:742
       slab_alloc_node mm/slub.c:3398
       __kmem_cache_alloc_node+0x4f2/0x930 mm/slub.c:3437
       __do_kmalloc_node mm/slab_common.c:954
       __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975
       kmalloc_reserve net/core/skbuff.c:437
       __alloc_skb+0x27a/0xab0 net/core/skbuff.c:509
       alloc_skb ./include/linux/skbuff.h:1267
       nlmsg_new ./include/net/netlink.h:964
       ip6addrlbl_get+0x490/0x10f0 net/ipv6/addrlabel.c:608
       rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082
       netlink_rcv_skb+0x299/0x550 net/netlink/af_netlink.c:2540
       rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6109
       netlink_unicast_kernel net/netlink/af_netlink.c:1319
       netlink_unicast+0x9ab/0xf50 net/netlink/af_netlink.c:1345
       netlink_sendmsg+0xebc/0x10f0 net/netlink/af_netlink.c:1921
      ...

    This patch ensures that the reserved field is always initialized.

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-2026-005808
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?33c0ff66");
  # https://lore.kernel.org/linux-cve-announce/2025050149-CVE-2022-49865-cd5b@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?39d2ccc2");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49865");
  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-2022-49865");

  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:"2022/12/08");
  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-4.19.0-91.82.190.007', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.007', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.007', '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_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');
}