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CVE-2023-53524
wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf
Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.

INFO

Published Date :

Oct. 1, 2025, 12:15 p.m.

Last Modified :

Oct. 2, 2025, 7:11 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2023-53524 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Apply kernel updates to fix an integer overflow in iwl_write_to_user_buf leading to heap overflow.
  • Update the Linux kernel to the latest version.
  • Apply security patches for the iwlwifi driver.
  • Reboot the system after applying updates.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-53524.

URL Resource
https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6
https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec
https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e
https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0
https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0
https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-53524 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-53524 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-53524 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-53524 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 01, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.
    Added Reference https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6
    Added Reference https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec
    Added Reference https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e
    Added Reference https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0
    Added Reference https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0
    Added Reference https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.