The vulnerability resides in the is in the internal mmap() defined in the fb_helper file operations of the udl driver of DisplayLink The vulnerability receives the cvss score 7.8 and declared as critical. It affects the function udl_fb_mmap of the file drivers/gpu/mmap. The vulnerability affects Linux kernel version 3.4 up to 4.15.4. It impacts from Linux kernel. version.”]
Source: https://gbhackers.com/8-year-old-privilege-escalation-vulnerability/