Oracle Linux 9 : qemu-kvm (ELSA-2026-500220)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-500220.
##

include('compat.inc');

if (description)
{
  script_id(339119);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/24");

  script_cve_id(
    "CVE-2024-6519",
    "CVE-2024-8612",
    "CVE-2026-5763",
    "CVE-2026-6425",
    "CVE-2026-8343",
    "CVE-2026-8348",
    "CVE-2026-9238",
    "CVE-2026-48002",
    "CVE-2026-48003",
    "CVE-2026-48004",
    "CVE-2026-48914"
  );

  script_name(english:"Oracle Linux 9 : qemu-kvm (ELSA-2026-500220)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2026-500220 advisory.

    - tests/9p: add 3 xattr FID limit test cases (local fs driver) (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - tests/9p: add 3 xattr FID limit test cases (synth fs driver) (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - tests/9p: add virtio_9p_add_synth_driver_args() test client function (Christian Schoenebeck) [Orabug:
    39636027] {CVE-2026-8348}
    - tests/9p: increase P9_MAX_SIZE for test client (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - hw/9pfs: add xattr count query interface to fs synth driver (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - hw/9pfs: enable xattr (mockup) support for synth fs driver (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - tests/9p: add Txattrcreate / Rxattrcreate test client functions (Christian Schoenebeck) [Orabug:
    39636027] {CVE-2026-8348}
    - tests/9p: add Tclunk / Rclunk test client functions (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - tests/9p: add Tread / Rread test client functions (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - qemu-options: document 9pfs max_xattr option (Christian Schoenebeck) [Orabug: 39636027] {CVE-2026-8348}
    - hw/9pfs: add max_xattr option (Christian Schoenebeck) [Orabug: 39636027] {CVE-2026-8348}
    - hw/9pfs: add xattr FID limit to prevent memory exhaustion (Christian Schoenebeck) [Orabug: 39636027]
    {CVE-2026-8348}
    - hw/9pfs: cap Treaddir allocation (CVE-2026-9238) (Christian Schoenebeck) [Orabug: 39601986]
    {CVE-2026-9238}
    - 9pfs/xen: implement response_buffer_size callback (Christian Schoenebeck) [Orabug: 39601986]
    {CVE-2026-9238}
    - 9pfs/virtio: implement response_buffer_size callback (Christian Schoenebeck) [Orabug: 39601986]
    {CVE-2026-9238}
    - hw/9pfs: add response_buffer_size transport callback (Christian Schoenebeck) [Orabug: 39601986]
    {CVE-2026-9238}
    - hw/9pfs: cap negotiated msize to transport limit (Christian Schoenebeck) [Orabug: 39601986]
    {CVE-2026-9238}
    - 9pfs/xen: implement msize_limit callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - 9pfs/virtio: implement msize_limit callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - hw/9pfs: add msize_limit transport callback (Christian Schoenebeck) [Orabug: 39601986] {CVE-2026-9238}
    - 9pfs: fix missing rename lock in v9fs_co_readdir_many (CVE-2026-48004) (sin99xx) [Orabug: 39478419]
    {CVE-2026-48004}
    - tests/qtest/libqos: add qvirtqueue_reset_pool() for descriptor pool reset (Christian Schoenebeck)
    [Orabug: 39636027] {CVE-2026-8348}
    - libvduse: fix buffer overflow in vduse_queue_read_indirect_desc() (Stefano Garzarella) [Orabug:
    39447322] {CVE-2026-6425}
    - libvhost-user: fix buffer overflow in virtqueue_read_indirect_desc() (Stefano Garzarella) [Orabug:
    39447322] {CVE-2026-6425}
    - virtio-blk: add missing VIRTIO_BLK_T_SCSI_CMD size check (CVE-2026-48914) (Stefan Hajnoczi) [Orabug:
    39522394] {CVE-2026-48914}
    - ui: fix validation of VNC extended clipboard data length (Heechan Kang) [Orabug: 39442988]
    {CVE-2026-8343}
    - ui/vnc: fix OOB read updating VNC update frequency stats (Daniel P. Berrange) [Orabug: 39447326]
    {CVE-2026-48003}
    - ui/vnc: fix OOB write in lossy rect worker code (Daniel P. Berrange) [Orabug: 39447332] {CVE-2026-48002}
    - ui/vnc: fix OOB write in VNC stats array (Daniel P. Berrange) [Orabug: 39447332] {CVE-2026-48002}
    - lsi53c895a: keep a reference to the device while SCRIPTS execute (Paolo Bonzini) [Orabug: 37517793]
    {CVE-2024-6519}
    - hw/scsi/lsi53c895a: fix memory leak in lsi_scsi_realize() (Zheng Huang) [Orabug: 37517793]
    {CVE-2024-6519}
    - hw/scsi/lsi53c895a: bump instruction limit in scripts processing to fix regression (Fiona Ebner)
    [Orabug: 37517793] {CVE-2024-6519}
    - hw/scsi/lsi53c895a: add timer to scripts processing (Sven Schnelle) [Orabug: 37517793] {CVE-2024-6519}
    - virtio-scsi: pass the same cdb_size to virtio_scsi_pop_req and virtio_scsi_handle_cmd_req_prepare (Paolo
    Bonzini) [Orabug: 39414097] {CVE-2026-5763}
    - softmmu: Support concurrent bounce buffers (Mattias Nissler) [Orabug: 37509310] {CVE-2024-8612}
    - system/physmem: Per-AddressSpace bounce buffering (Mattias Nissler) [Orabug: 37509310] {CVE-2024-8612}
    - system/physmem: Propagate AddressSpace to MapClient helpers (Mattias Nissler) [Orabug: 37509310]
    {CVE-2024-8612}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2026-500220.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/C:N/I:P/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:H/UI:N/S:C/C:H/I:H/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-2026-48914");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-6519");

  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:"2024/09/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-block-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-block-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-block-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-block-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-kvm-device-usb-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:qemu-virtiofsd");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle 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_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  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) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_product)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
if (! preg(pattern:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Oracle Linux 9.x', 'Oracle Linux ' + os_version);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var constraints = [
  {
    'release': '9',
    'pkgs': [
      {'reference':'qemu-guest-agent-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-img-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-curl-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-iscsi-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-rbd-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-ssh-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-common-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-core-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-device-usb-host-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-virtiofsd-7.2.0-42.el9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-guest-agent-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-img-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-curl-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-iscsi-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-rbd-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-block-ssh-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-common-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-core-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-kvm-device-usb-host-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'},
      {'reference':'qemu-virtiofsd-7.2.0-42.el9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'31'}
    ]
  }
];

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, 'qemu-guest-agent / qemu-img / qemu-kvm / etc');
}