Linux Distros Unpatched Vulnerability : CVE-2024-36899

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

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  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/22");

  script_cve_id("CVE-2024-36899");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2024-36899");

  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: gpiolib: cdev: Fix use after free in
    lineinfo_changed_notify The use-after-free issue occurs as follows: when the GPIO chip device file is
    being closed by invoking gpio_chrdev_release(), watched_lines is freed by bitmap_free(), but the
    unregistration of lineinfo_changed_nb notifier chain failed due to waiting write rwsem. Additionally, one
    of the GPIO chip's lines is also in the release process and holds the notifier chain's read rwsem.
    Consequently, a race condition leads to the use-after-free of watched_lines. Here is the typical stack
    when issue happened: [free] gpio_chrdev_release() --> bitmap_free(cdev->watched_lines) <-- freed -->
    blocking_notifier_chain_unregister() --> down_write(&nh->rwsem) <-- waiting rwsem -->
    __down_write_common() --> rwsem_down_write_slowpath() --> schedule_preempt_disabled() --> schedule() [use]
    st54spi_gpio_dev_release() --> gpio_free() --> gpiod_free() --> gpiod_free_commit() -->
    gpiod_line_state_notify() --> blocking_notifier_call_chain() --> down_read(&nh->rwsem); <-- held rwsem -->
    notifier_call_chain() --> lineinfo_changed_notify() --> test_bit(xxxx, cdev->watched_lines) <-- use after
    free The side effect of the use-after-free issue is that a GPIO line event is being generated for
    userspace where it shouldn't. However, since the chrdev is being closed, userspace won't have the chance
    to read that event anyway. To fix the issue, call the bitmap_free() function after the unregistration of
    lineinfo_changed_nb notifier chain. (CVE-2024-36899)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2024-36899");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2024-36899");
  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:C/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-36899");

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  script_set_attribute(attribute:"vuln_publication_date", value:"2024/05/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/05");

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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
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if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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          {"reference": "kernel-rt-modules-partner"},
          {"reference": "kernel-rt-selftests-internal"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}