sound/core/timer.c in the Linux kernel before 4.4.1 retains certain linked lists after a close or stop action, which allows local users to cause a denial of service (system crash) via a crafted ioctl call, related to the (1) snd_timer_close and (2) _snd_timer_stop functions.
Exploitability
AV:LAC:LPR:NUI:NScope
S:UImpact
C:NI:NA:H6.2/CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H