OpenAFS before 1.6.24 and 1.8.x before 1.8.5 is prone to information leakage upon certain error conditions because uninitialized RPC output variables are sent over the network to a peer.
https://openafs.org/pages/security/OPENAFS-SA-2019-001.txt
https://lists.debian.org/debian-lts-announce/2019/11/msg00002.html