Important: xorg-x11-server

Issue Overview:

The ProcRenderAddGlyphs() function calls the AllocateGlyph() function to store new glyphs sent by the client to the X server. AllocateGlyph() would return a new glyph with refcount=0 and a re-used glyph would end up not changing the refcount at all. The resulting glyph_new array would thus have multiple entries pointing to the same non-refcounted glyphs.

ProcRenderAddGlyphs() may free a glyph, resulting in a use-after-free when the same glyph pointer is then later used. (CVE-2024-31083)

Affected Packages:

xorg-x11-server

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

New Packages:

i686:  
    xorg-x11-server-devel-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-Xephyr-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-Xdmx-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-Xnest-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-debuginfo-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-Xvfb-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-common-1.17.4-18.55.amzn1.i686  
    xorg-x11-server-Xorg-1.17.4-18.55.amzn1.i686  
  
noarch:  
    xorg-x11-server-source-1.17.4-18.55.amzn1.noarch  
  
src:  
    xorg-x11-server-1.17.4-18.55.amzn1.src  
  
x86_64:  
    xorg-x11-server-devel-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-Xvfb-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-Xdmx-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-Xorg-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-Xnest-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-debuginfo-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-Xephyr-1.17.4-18.55.amzn1.x86_64  
    xorg-x11-server-common-1.17.4-18.55.amzn1.x86_64  

Additional References

Red Hat: CVE-2024-31083

Mitre: CVE-2024-31083