CVE-2021-26400

CVE-2021-26400 is a medium-severity vulnerability in Amd Cpu with a CVSS 3.x base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

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.

Frequently asked questions

What is CVE-2021-26400?
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.
How severe is CVE-2021-26400?
CVE-2021-26400 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-26400 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26400?
CVE-2021-26400 affects Amd Cpu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26400?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26400 published?
CVE-2021-26400 was published on 2022-05-11 and last updated on 2026-06-17.

References

Affected products (1)