A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of ttys could lead to a use-after-free.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:NI:NA:H5.1/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H