rx/rx.c in OpenAFS before 1.6.15 and 1.7.x before 1.7.33 does not properly initialize the padding of a data structure when constructing an Rx acknowledgement (ACK) packet, which allows remote attackers to obtain sensitive information by (1) conducting a replay attack or (2) sniffing the network.
https://www.openafs.org/pages/security/OPENAFS-SA-2015-007.txt
https://www.openafs.org/dl/openafs/1.6.15/RELNOTES-1.6.15
https://lists.openafs.org/pipermail/openafs-announce/2015/000493.html