Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP2)

This update for the Linux Kernel 5.3.18-24_46 fixes several issues. The following security issues were fixed: - CVE-2020-29373: Fixed an issue where kernel unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations (bsc#1179779). - CVE-2020-29569: Fixed a use after free due to a logic error (bsc#1180008). - CVE-2020-29368: Fixed an issue in copy-on-write implementation which could grant unintended write access because of a race condition in a THP mapcount check (bsc#1179664).