Several operating systems or hypervisors do not expect or properly handle an Intel architecture hardware debug exception in certain circumstance, due to interpretation of potentially unclear existing documentation and guidance on the use of these instructions.This improper handling may allow an attacker to utilize operating system APIs to gain access to sensitive memory information or control low-level operating system functions.
Therefore, BtCIRT recommends all its constituents to check with your operating system or software vendor for updates to address this issue and apply updates. A list of affected vendors and currently-known updates is available at: CERT Vulnerability Database .
Patch and be protected.