Unity Linux 20.1070e Security Update: kernel (UTSA-2026-131780)

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

include('compat.inc');

if (description)
{
  script_id(366608);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/19");

  script_cve_id("CVE-2024-26953");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-131780)");

  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-2026-131780 advisory.

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

    net: esp: fix bad handling of pages from page_pool

    When the skb is reorganized during esp_output (!esp->inline), the pages
    coming from the original skb fragments are supposed to be released back
    to the system through put_page. But if the skb fragment pages are
    originating from a page_pool, calling put_page on them will trigger a
    page_pool leak which will eventually result in a crash.

    This leak can be easily observed when using CONFIG_DEBUG_VM and doing
    ipsec + gre (non offloaded) forwarding:

      BUG: Bad page state in process ksoftirqd/16  pfn:1451b6
      page:00000000de2b8d32 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1451b6000 pfn:0x1451b6
      flags: 0x200000000000000(node=0|zone=2)
      page_type: 0xffffffff()
      raw: 0200000000000000 dead000000000040 ffff88810d23c000 0000000000000000
      raw: 00000001451b6000 0000000000000001 00000000ffffffff 0000000000000000
      page dumped because: page_pool leak
      Modules linked in: ip_gre gre mlx5_ib mlx5_core xt_conntrack xt_MASQUERADE nf_conntrack_netlink
    nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter rpcrdma rdma_ucm ib_iser libiscsi
    scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm ib_uverbs ib_core overlay zram zsmalloc fuse
    [last unloaded: mlx5_core]
      CPU: 16 PID: 96 Comm: ksoftirqd/16 Not tainted 6.8.0-rc4+ #22
      Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org
    04/01/2014
      Call Trace:
       <TASK>
       dump_stack_lvl+0x36/0x50
       bad_page+0x70/0xf0
       free_unref_page_prepare+0x27a/0x460
       free_unref_page+0x38/0x120
       esp_ssg_unref.isra.0+0x15f/0x200
       esp_output_tail+0x66d/0x780
       esp_xmit+0x2c5/0x360
       validate_xmit_xfrm+0x313/0x370
       ? validate_xmit_skb+0x1d/0x330
       validate_xmit_skb_list+0x4c/0x70
       sch_direct_xmit+0x23e/0x350
       __dev_queue_xmit+0x337/0xba0
       ? nf_hook_slow+0x3f/0xd0
       ip_finish_output2+0x25e/0x580
       iptunnel_xmit+0x19b/0x240
       ip_tunnel_xmit+0x5fb/0xb60
       ipgre_xmit+0x14d/0x280 [ip_gre]
       dev_hard_start_xmit+0xc3/0x1c0
       __dev_queue_xmit+0x208/0xba0
       ? nf_hook_slow+0x3f/0xd0
       ip_finish_output2+0x1ca/0x580
       ip_sublist_rcv_finish+0x32/0x40
       ip_sublist_rcv+0x1b2/0x1f0
       ? ip_rcv_finish_core.constprop.0+0x460/0x460
       ip_list_rcv+0x103/0x130
       __netif_receive_skb_list_core+0x181/0x1e0
       netif_receive_skb_list_internal+0x1b3/0x2c0
       napi_gro_receive+0xc8/0x200
       gro_cell_poll+0x52/0x90
       __napi_poll+0x25/0x1a0
       net_rx_action+0x28e/0x300
       __do_softirq+0xc3/0x276
       ? sort_range+0x20/0x20
       run_ksoftirqd+0x1e/0x30
       smpboot_thread_fn+0xa6/0x130
       kthread+0xcd/0x100
       ? kthread_complete_and_exit+0x20/0x20
       ret_from_fork+0x31/0x50
       ? kthread_complete_and_exit+0x20/0x20
       ret_from_fork_asm+0x11/0x20
       </TASK>

    The suggested fix is to introduce a new wrapper (skb_page_unref) that
    covers page refcounting for page_pool pages as well.

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-2026-131780
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?11ee9072");
  # https://lore.kernel.org/linux-cve-announce/2024050128-CVE-2024-26953-8304@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2090e0b3");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-26953");
  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: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-2024-26953");

  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:"2026/10/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/16");

  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-5.10.0-79.26.uel20', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.26.uel20', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.26.uel20', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.26.uel20', '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');
}