CVE-2021-26324

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-10 · updated 2026-06-17

Description

A bug with the SEV-ES TMR may lead to a potential loss of memory integrity for SNP-active VMs.

Affected products

AMD Epyc 72F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7313 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7313P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7343 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7373X Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 73F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7413 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7443 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7443P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7453 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7473X Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 74F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7513 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7543 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7543P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7573X Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 75F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7643 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7663 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7713 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7713P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7763 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7773X Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4

How to fix

Upgrade to a fixed version: AMD Epyc 72F3 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7313 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7313P Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7343 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7373X Firmware milanpi-sp3_1.0.0.4; AMD Epyc 73F3 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7413 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7443 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7443P Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7453 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7473X Firmware milanpi-sp3_1.0.0.4; AMD Epyc 74F3 Firmware milanpi-sp3_1.0.0.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-26324 or the next vulnerability affects your stack