This update for the Linux Kernel 4.4.21-81 fixes one issue.
The following security bugs were fixed:
- CVE-2017-7184: The XFRM processsing in the Linux kernel 16.10 allowed
local users to obtain root privileges or cause a denial of service
(heap-based out-of-bounds access) via an integer overflow, as
demonstrated during a Pwn2Own competition at CanSecWest 2017