Medium: kernel

Issue Overview:

A NULL pointer dereference issue was found in the Linux kernel. If the close() and fchownat() system calls share a socket file descriptor as an argument, then the two calls can race and trigger a NULL pointer dereference leading to a system crash and a denial of service.(CVE-2018-12232)

Affected Packages:

kernel

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

New Packages:

i686:  
    perf-debuginfo-4.14.51-60.38.amzn1.i686  
    kernel-devel-4.14.51-60.38.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.51-60.38.amzn1.i686  
    kernel-tools-debuginfo-4.14.51-60.38.amzn1.i686  
    kernel-headers-4.14.51-60.38.amzn1.i686  
    kernel-tools-devel-4.14.51-60.38.amzn1.i686  
    kernel-tools-4.14.51-60.38.amzn1.i686  
    kernel-4.14.51-60.38.amzn1.i686  
    kernel-debuginfo-4.14.51-60.38.amzn1.i686  
    perf-4.14.51-60.38.amzn1.i686  
  
src:  
    kernel-4.14.51-60.38.amzn1.src  
  
x86_64:  
    kernel-devel-4.14.51-60.38.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.51-60.38.amzn1.x86_64  
    perf-4.14.51-60.38.amzn1.x86_64  
    kernel-tools-4.14.51-60.38.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.51-60.38.amzn1.x86_64  
    kernel-debuginfo-4.14.51-60.38.amzn1.x86_64  
    kernel-4.14.51-60.38.amzn1.x86_64  
    kernel-headers-4.14.51-60.38.amzn1.x86_64  
    kernel-tools-devel-4.14.51-60.38.amzn1.x86_64  
    perf-debuginfo-4.14.51-60.38.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-12232

Mitre: CVE-2018-12232