CVE-2018-10902

Se ha detectado que el controlador del kernel midi raw no protege contra el acceso concurrente, lo que conduce a un doble realloc (doble liberación) en snd_rawmidi_input_params() y snd_rawmidi_output_status(), que son parte del manipulador snd_rawmidi_ioctl() en el archivo rawmidi.c. Un atacante local malicioso podría utilizarlo para escalar privilegios.

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of MIDI devices. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges to the level of kernel.