Amazon Linux AMI Security Advisory: ALAS-2012-34
Advisory Release Date: 2012-01-06 10:19 Pacific
Advisory Updated Date: 2014-09-14 15:11 Pacific
The Linux kernel before 3.2.2 does not properly restrict SG_IO ioctl calls, which allows local users to bypass intended restrictions on disk read and write operations by sending a SCSI command to (1) a partition block device or (2) an LVM volume.
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.