Advisory Published
Updated

CVE-2021-26400

First published: Wed May 11 2022(Updated: )

AMD processors may speculatively re-order load instructions which can result in stale data being observed when multiple processors are operating on shared memory, resulting in potential data leakage.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
AMD CPUs

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Frequently Asked Questions

  • What is the severity of CVE-2021-26400?

    CVE-2021-26400 is classified as a high severity vulnerability due to potential data leakage in AMD processors.

  • How do I fix CVE-2021-26400?

    Fixes for CVE-2021-26400 involve applying firmware updates provided by AMD for affected CPUs.

  • Which AMD processors are affected by CVE-2021-26400?

    CVE-2021-26400 affects various AMD CPUs susceptible to speculative execution issues.

  • What are the risks associated with CVE-2021-26400?

    The primary risk of CVE-2021-26400 is the potential leakage of sensitive data due to shared memory operations.

  • When was CVE-2021-26400 discovered?

    CVE-2021-26400 was discovered in early 2021, highlighting speculative execution vulnerabilities in AMD processors.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203