CVE-2023-46837 (published 2024-01-05T16:36:10.881Z)
Arm provides multiple helpers to clean & invalidate the cache
for a given region.  This is, for instance, used when allocating
guest memory to ensure any writes (such as the ones during scrubbing)
have reached memory before handing over the page to a guest.

Unfortunately, the arithmetics in the helpers can overflow and would
then result to skip the cache cleaning/invalidation.  Therefore there
is no guarantee when all the writes will reach the memory.

This undefined behavior was meant to be addressed by XSA-437, but the
approach was not sufficient.

Affected products: Vendor: Xen
Product: Xen
Versions: consult Xen advisory XSA-447