A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.
An integer value is specified to be shifted by a negative amount or an amount greater than or equal to the number of bits contained in the value causing an unexpected or indeterminate result.
The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2213485 | patch third party advisory issue tracking |
| https://github.com/torvalds/linux/commit/2b09d5d364986f724f17001ccfe4126b9b43a0be | patch |