There is a NULL Pointer Dereference in libxml2 in xmlSnprintfElementContent__internal_alias that can lead to segmentation fault and cause denial-of-service.
Created libxml2 tracking bugs for this issue:
Affects: fedora-all [bug 1956529]
Created mingw-libxml2 tracking bugs for this issue:
Affects: fedora-all [bug 1956530]
*** This bug has been marked as a duplicate of bug 1956522 ***