Intel has announced a new vulnerability affecting some of their processors, called MDS, or Microarchitectural Data Sampling. Four forms of this have been identified and each has a separate CVE classification: CVE-2018-12126, CVE-2018-12130, CVE-2018-12127 and CVE-2019-11091.

The problem arises again from speculative execution, as MDS allows access to data stored in the processor's internal structure, including various buffers, for a code that should not otherwise access stored information.