Linux Distros Unpatched Vulnerability : CVE-2025-21740

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

include('compat.inc');

if (description)
{
  script_id(231267);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/03/06");

  script_cve_id("CVE-2025-21740");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-21740");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure NX huge page
    recovery thread is alive before waking When waking a VM's NX huge page recovery thread, ensure the thread
    is actually alive before trying to wake it. Now that the thread is spawned on-demand during KVM_RUN, a VM
    without a recovery thread is reachable via the related module params. BUG: kernel NULL pointer
    dereference, address: 0000000000000040 #PF: supervisor read access in kernel mode #PF: error_code(0x0000)
    - not-present page Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP:
    0010:vhost_task_wake+0x5/0x10 Call Trace: <TASK> set_nx_huge_pages+0xcc/0x1e0 [kvm]
    param_attr_store+0x8a/0xd0 module_attr_store+0x1a/0x30 kernfs_fop_write_iter+0x12f/0x1e0
    vfs_write+0x233/0x3e0 ksys_write+0x60/0xd0 do_syscall_64+0x5b/0x160
    entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f3b52710104 </TASK> Modules linked in: kvm_intel kvm
    CR2: 0000000000000040 (CVE-2025-21740)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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-2025-21740");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/02/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/06");

  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:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/Debian/dpkg-l", "Host/Debian/release");

  exit(0);
}
include('vdf.inc');

# @tvdl-content
var vuln_data = {
 "metadata": {
  "spec_version": "1.0p"
 },
 "requires": [
  {
   "scope": "scan_config",
   "match": {
    "vendor_unpatched": true
   }
  },
  {
   "scope": "target",
   "match": {
    "os": "linux"
   }
  }
 ],
 "report": {
  "report_type": "unpatched"
 },
 "checks": [
  {
   "product": {
    "name": [
     "bpftool",
     "hyperv-daemons",
     "intel-sdsi",
     "libcpupower-dev",
     "libcpupower1",
     "linux-bpf-dev",
     "linux-config-6.12",
     "linux-cpupower",
     "linux-doc",
     "linux-doc-6.12",
     "linux-headers-4kc-malta",
     "linux-headers-5kc-malta",
     "linux-headers-6.12.12-4kc-malta",
     "linux-headers-6.12.12-5kc-malta",
     "linux-headers-6.12.12-alpha-generic",
     "linux-headers-6.12.12-alpha-smp",
     "linux-headers-6.12.12-amd64",
     "linux-headers-6.12.12-arm64",
     "linux-headers-6.12.12-arm64-16k",
     "linux-headers-6.12.12-armmp",
     "linux-headers-6.12.12-armmp-lpae",
     "linux-headers-6.12.12-cloud-amd64",
     "linux-headers-6.12.12-cloud-arm64",
     "linux-headers-6.12.12-common",
     "linux-headers-6.12.12-common-rt",
     "linux-headers-6.12.12-loong64",
     "linux-headers-6.12.12-loongson-3",
     "linux-headers-6.12.12-m68k",
     "linux-headers-6.12.12-mips32r2eb",
     "linux-headers-6.12.12-mips32r2el",
     "linux-headers-6.12.12-mips64r2eb",
     "linux-headers-6.12.12-mips64r2el",
     "linux-headers-6.12.12-mips64r6el",
     "linux-headers-6.12.12-octeon",
     "linux-headers-6.12.12-parisc",
     "linux-headers-6.12.12-parisc64"
    ],
    "type": "dpkg_package"
   },
   "check_algorithm": "dpkg",
   "constraints": [
    {
     "requires": [
      {
       "scope": "target",
       "match": {
        "distro": "debian"
       }
      },
      {
       "scope": "target",
       "match": {
        "os_version": "13"
       }
      }
     ]
    }
   ]
  }
 ]
};

var vdf_res = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result: vdf_res);