CVE-2023-53524

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