Important: kernel

Issue Overview:

A flaw was found in the Linux kernel’s NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.(CVE-2018-16884)

Affected Packages:

kernel

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update kernel to update your system.

New Packages:

aarch64:  
    kernel-4.14.94-89.73.amzn2.aarch64  
    kernel-headers-4.14.94-89.73.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.94-89.73.amzn2.aarch64  
    perf-4.14.94-89.73.amzn2.aarch64  
    perf-debuginfo-4.14.94-89.73.amzn2.aarch64  
    python-perf-4.14.94-89.73.amzn2.aarch64  
    python-perf-debuginfo-4.14.94-89.73.amzn2.aarch64  
    kernel-tools-4.14.94-89.73.amzn2.aarch64  
    kernel-tools-devel-4.14.94-89.73.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.94-89.73.amzn2.aarch64  
    kernel-devel-4.14.94-89.73.amzn2.aarch64  
    kernel-debuginfo-4.14.94-89.73.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.94-89.73.amzn2.i686  
  
src:  
    kernel-4.14.94-89.73.amzn2.src  
  
x86_64:  
    kernel-4.14.94-89.73.amzn2.x86_64  
    kernel-headers-4.14.94-89.73.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.94-89.73.amzn2.x86_64  
    perf-4.14.94-89.73.amzn2.x86_64  
    perf-debuginfo-4.14.94-89.73.amzn2.x86_64  
    python-perf-4.14.94-89.73.amzn2.x86_64  
    python-perf-debuginfo-4.14.94-89.73.amzn2.x86_64  
    kernel-tools-4.14.94-89.73.amzn2.x86_64  
    kernel-tools-devel-4.14.94-89.73.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.94-89.73.amzn2.x86_64  
    kernel-devel-4.14.94-89.73.amzn2.x86_64  
    kernel-debuginfo-4.14.94-89.73.amzn2.x86_64  

Additional References

Red Hat: CVE-2018-16884

Mitre: CVE-2018-16884