Allocation for pixmap data in AllocatePixmap() does not initialize the memory in xserver, it leads to leak uninitialize heap memory to clients. When the X server runs with elevated privileges, this can lead to privilege elevation in the client.
Name: X.org project
Upstream: Jan-Niklas Sohn (Trend Micro Zero Day Initiative)
Created xorg-x11-server tracking bugs for this issue:
Affects: fedora-all [bug 1862517]