A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
Exploitability
AV:PAC:LPR:HUI:NScope
S:UImpact
C:LI:LA:H5/CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H