CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of oversized serial replies in the mhz19b driver, which can lead to a buffer overflow in the receive buffer. This flaw could potentially allow an attacker to exploit the overflow, resulting in undefined behavior or system instability. Organizations utilizing Linux systems with the mhz19b driver should prioritize patching this vulnerability to mitigate the risk of exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: iio: chemical: mhz19b: reject oversized serial replies mhz19b_receive_buf() appends each serdev chunk into the fixed MHZ19B_CMD_SIZE receive buffer and advances buf_idx by len without checking that the chunk fits in the remaining space. A large callback can therefore overflow st->buf before the command path validates the reply. Reset the reply state before each command and reject oversized serial replies before copying them into the fixed buffer. When an oversized reply is detected, wake the waiter and report -EMSGSIZE instead of overwriting st->buf.