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CVE-2023-53524 Detail

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.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6 kernel.org
https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec kernel.org
https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e kernel.org
https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0 kernel.org
https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0 kernel.org
https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-53524
NVD Published Date:
10/01/2025
NVD Last Modified:
10/01/2025
Source:
kernel.org