Microsoft releases Windows security updates for Intel CPU flaws

Microsoft has released out-of-band security updates for ‘Memory Mapped I/O Stale Data’ information disclosure vulnerabilities in Intel CPUs.

The Mapped I/O side-channel vulnerabilities were initially disclosed by Intel on June 14th, 2022, warning that the flaws could allow processes running in a virtual machine to access data from another virtual machine.

“An attacker who successfully exploited these vulnerabilities might be able to read privileged data across trust boundaries,” explained Microsoft.

According to Microsoft’s advisory, no security updates were released except mitigations applied for Windows Server 2019 and Windows Server 2022.

Microsoft has released a somewhat confusing set of security updates for Windows 10, Windows 11, and Windows Server that address these vulnerabilities.

These are likely being released as optional, manual updates as the mitigations for these vulnerabilities can cause performance issues, and the flaws may not be fully resolved without disabling Intel Hyper-Threading Technology in some scenarios.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.
This field is for validation purposes and should be left unchanged.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:

Tell us About your Needs
Get an Answer the Same Business Day

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.

What happens next:

A Vumetric expert will contact you to learn more about your cybersecurity needs and goals.

The project's scope will be defined (Target environment, deadlines, requirements, etc.)

A detailed quote including all-inclusive pricing and statement of work is sent to you.

This field is for validation purposes and should be left unchanged.


Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.


Enter your Email Address

This field is for validation purposes and should be left unchanged.

* No free email provider (e.g:,, etc.)

This site is registered on as a development site. Switch to a production site key to remove this banner.