Linux Kernel GPIO Virtuser Out-of-Bound Write Vulnerability

A vulnerability in the Linux kernel's GPIO virtuser component could lead to an out-of-bounds write. This issue arises because the 'count' of written characters can be truncated to fit the maximum available space when the caller exceeds it. The vulnerability has been addressed by ensuring that the input size does not surpass the buffer capacity and by adding a zero termination afterwards.

Impact

Exploitation of this vulnerability could lead to memory corruption by allowing data to be written outside the intended buffer boundaries.