A flaw was found in the Linux kernel showed that some data structures used by DMA transfer on ARM64 based systems were not initialized.
This could allow local users to obtain sensitive information from kernel memory mapping and addresses by triggering a dma_mmap call and reconstructing the data. This is considered a kernel information leak. At this time there is no panic or denial of service that can be generated from this flaw, but this information could be used in gathering information to be used in further attacks.
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1383384]
This issue doesn't affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6,7 and MRG-2. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.