libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.Referenceshttps://github.com/sahlberg/libnfs/commit/935b8db712b3c6649bc57ddc276526c4a31680de
