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Vulnerability record · CVE-2021-26312 · published 16 November 2021

CVE-2021-26312: Amd epyc 7601 firmware exposure of resource to wrong sphere vulnerability

AAmd · Epyc 7601 Firmware

Failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU) may lead an IO device to write to memory it should not be able to access, resulting in a potential loss of integrity.

5.5 CVSS 3.1 Medium EPSS 0.25% · top 85.2% CWE-665 · CWE-665CWE-668 · Exposure of resource to wrong sphere
5.5CVSS 3.1 base score, v2 2.1
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
57Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU) may lead an IO device to write to memory it should not be able to access, resulting in a potential loss of integrity.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

57 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-26312), CISA KEV, FIRST EPSS (scores of 2026-10-13). This page is refreshed as NVD updates the record.