[ALAS2-2019-1281] Amazon Linux 2 2017.12 - ALAS2-2019-1281: medium priority package update for kernel

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities:
CVE-2018-9363:
A buffer overflow due to a singed-unsigned comparsion was found in hidp_process_report() in the net/bluetooth/hidp/core.c in the Linux kernel. The buffer length is an unsigned int but gets cast to a signed int which in certain conditions can lead to a system panic and a denial-of-service.
1623067:
CVE-2018-9363 kernel: Buffer overflow in hidp_process_report

CVE-2018-15594:
It was found that paravirt_patch_call/jump() functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests.
1620555:
CVE-2018-15594 kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests