Important: xorg-x11-server

Issue Overview:

A flaw was found in xorg-x11-server. An interger underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-3472)

Affected Packages:

xorg-x11-server

Issue Correction:
Run yum update xorg-x11-server to update your system.

New Packages:

i686:  
    xorg-x11-server-Xdmx-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-Xorg-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-Xephyr-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-Xnest-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-devel-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-debuginfo-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-common-1.17.4-18.44.amzn1.i686  
    xorg-x11-server-Xvfb-1.17.4-18.44.amzn1.i686  
  
noarch:  
    xorg-x11-server-source-1.17.4-18.44.amzn1.noarch  
  
src:  
    xorg-x11-server-1.17.4-18.44.amzn1.src  
  
x86_64:  
    xorg-x11-server-debuginfo-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-Xnest-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-Xephyr-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-Xvfb-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-Xdmx-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-devel-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-Xorg-1.17.4-18.44.amzn1.x86_64  
    xorg-x11-server-common-1.17.4-18.44.amzn1.x86_64  

Additional References

Red Hat: CVE-2021-3472

Mitre: CVE-2021-3472