CVE-2022-33747

Arm: unbounded memory consumption for 2nd-level page tables Certain actions
require e.g. removing pages from a guest’s P2M (Physical-to-Machine)
mapping. When large pages are in use to map guest pages in the 2nd-stage
page tables, such a removal operation may incur a memory allocation (to
replace a large mapping with individual smaller ones). These memory
allocations are taken from the global memory pool. A malicious guest might
be able to cause the global memory pool to be exhausted by manipulating its
own P2M mappings.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1021668&gt;

Notes