Unity Linux 20.1050e Security Update: kernel (UTSA-2026-006832)

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

include('compat.inc');

if (description)
{
  script_id(305432);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/08");

  script_cve_id("CVE-2025-39865");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2026-006832)");

  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-2026-006832 advisory.

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

    tee: fix NULL pointer dereference in tee_shm_put

    tee_shm_put have NULL pointer dereference:

    __optee_disable_shm_cache -->
            shm = reg_pair_to_ptr(...);//shm maybe return NULL
            tee_shm_free(shm); -->
                    tee_shm_put(shm);//crash

    Add check in tee_shm_put to fix it.

    panic log:
    Unable to handle kernel paging request at virtual address 0000000000100cca
    Mem abort info:
    ESR = 0x0000000096000004
    EC = 0x25: DABT (current EL), IL = 32 bits
    SET = 0, FnV = 0
    EA = 0, S1PTW = 0
    FSC = 0x04: level 0 translation fault
    Data abort info:
    ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
    CM = 0, WnR = 0, TnD = 0, TagAccess = 0
    GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
    user pgtable: 4k pages, 48-bit VAs, pgdp=0000002049d07000
    [0000000000100cca] pgd=0000000000000000, p4d=0000000000000000
    Internal error: Oops: 0000000096000004 [#1] SMP
    CPU: 2 PID: 14442 Comm: systemd-sleep Tainted: P OE ------- ----
    6.6.0-39-generic #38
    Source Version: 938b255f6cb8817c95b0dd5c8c2944acfce94b07
    Hardware name: greatwall GW-001Y1A-FTH, BIOS Great Wall BIOS V3.0
    10/26/2022
    pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
    pc : tee_shm_put+0x24/0x188
    lr : tee_shm_free+0x14/0x28
    sp : ffff001f98f9faf0
    x29: ffff001f98f9faf0 x28: ffff0020df543cc0 x27: 0000000000000000
    x26: ffff001f811344a0 x25: ffff8000818dac00 x24: ffff800082d8d048
    x23: ffff001f850fcd18 x22: 0000000000000001 x21: ffff001f98f9fb88
    x20: ffff001f83e76218 x19: ffff001f83e761e0 x18: 000000000000ffff
    x17: 303a30303a303030 x16: 0000000000000000 x15: 0000000000000003
    x14: 0000000000000001 x13: 0000000000000000 x12: 0101010101010101
    x11: 0000000000000001 x10: 0000000000000001 x9 : ffff800080e08d0c
    x8 : ffff001f98f9fb88 x7 : 0000000000000000 x6 : 0000000000000000
    x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
    x2 : ffff001f83e761e0 x1 : 00000000ffff001f x0 : 0000000000100cca
    Call trace:
    tee_shm_put+0x24/0x188
    tee_shm_free+0x14/0x28
    __optee_disable_shm_cache+0xa8/0x108
    optee_shutdown+0x28/0x38
    platform_shutdown+0x28/0x40
    device_shutdown+0x144/0x2b0
    kernel_power_off+0x3c/0x80
    hibernate+0x35c/0x388
    state_store+0x64/0x80
    kobj_attr_store+0x14/0x28
    sysfs_kf_write+0x48/0x60
    kernfs_fop_write_iter+0x128/0x1c0
    vfs_write+0x270/0x370
    ksys_write+0x6c/0x100
    __arm64_sys_write+0x20/0x30
    invoke_syscall+0x4c/0x120
    el0_svc_common.constprop.0+0x44/0xf0
    do_el0_svc+0x24/0x38
    el0_svc+0x24/0x88
    el0t_64_sync_handler+0x134/0x150
    el0t_64_sync+0x14c/0x15

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-2026-006832
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a37bdc91");
  # https://lore.kernel.org/linux-cve-announce/2025091906-CVE-2025-39865-3086@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5631984a");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2025-39865");
  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-2025-39865");

  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:"2025/09/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/08");

  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:"^20.1050e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e', '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': '1050e',
    'pkgs': [
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.5', 'sp':'1050e', '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');
}