OpenAFS before 1.6.24 and 1.8.x before 1.8.5 is prone to denial of service from unserialized data access because remote attackers can make a series of VOTE_Debug RPC calls to crash a database server within the SVOTE_Debug RPC handler.
https://openafs.org/pages/security/OPENAFS-SA-2019-003.txt
https://lists.debian.org/debian-lts-announce/2019/11/msg00002.html