Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-3C7BA82A-D3FB-11EA-9ABA-0C9D925BBBC0:
The X.org project reports:
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 flaw can lead to ASLR bypass, which when combined with other
flaws (known/unknown) could lead to lead to privilege elevation in
the client.
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center