Critical: kernel

Issue Overview:

Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service. An attacker can induce a denial of service condition by sending specially modified packets within ongoing TCP sessions. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port. Thus, the attacks cannot be performed using spoofed IP addresses. (https://www.kb.cert.org/vuls/id/962459)

Affected Packages:

kernel

Issue Correction:
Run yum update kernel and reboot your instance to update your system.

New Packages:

i686:  
    kernel-headers-4.14.59-64.43.amzn1.i686  
    kernel-tools-4.14.59-64.43.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.59-64.43.amzn1.i686  
    kernel-debuginfo-4.14.59-64.43.amzn1.i686  
    perf-4.14.59-64.43.amzn1.i686  
    kernel-tools-debuginfo-4.14.59-64.43.amzn1.i686  
    kernel-4.14.59-64.43.amzn1.i686  
    kernel-devel-4.14.59-64.43.amzn1.i686  
    perf-debuginfo-4.14.59-64.43.amzn1.i686  
    kernel-tools-devel-4.14.59-64.43.amzn1.i686  
  
src:  
    kernel-4.14.59-64.43.amzn1.src  
  
x86_64:  
    perf-debuginfo-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-4.14.59-64.43.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.59-64.43.amzn1.x86_64  
    perf-4.14.59-64.43.amzn1.x86_64  
    kernel-headers-4.14.59-64.43.amzn1.x86_64  
    kernel-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-devel-4.14.59-64.43.amzn1.x86_64  
    kernel-devel-4.14.59-64.43.amzn1.x86_64  
    kernel-debuginfo-4.14.59-64.43.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-5390

Mitre: CVE-2018-5390