Lua through 5.4.0 mishandles the interaction between stack resizes and garbage collection, leading to a heap-based buffer overflow, heap-based buffer over-read, or use-after-free.
Created lua tracking bugs for this issue:
Affects: fedora-all [bug 1860312]
This affects rhel-8 as well. Why was it closed as NOTABUG?
Analysis has shown that the CVE does not actually apply to the code in RHEL8. In case you have a reproducer that "works" on RHEL-8 we are all too willing to re-open this issue.