There is an updated pull request by leahneukirchen against master on the void-packages repository

https://github.com/leahneukirchen/void-packages libxml2
https://github.com/void-linux/void-packages/pull/35780

libxml2 and libxslt bumps
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Fixes a bunch of CVE.

A patch file from https://github.com/void-linux/void-packages/pull/35780.patch is attached