CVE-2021-26312

Name: CVE-2021-26312
Creator: NVD / NIST
Published: 2021-11-16T18:15:07.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2021-26312 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.24%

14.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Amd	Epyc 7601 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7551p Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7551 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7501 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7451 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7401 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7371 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7351p Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7351 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7301 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7281 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7261 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7251 Firmware	< naplespi-sp3_1.0.0.g
Amd	Epyc 7f72 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7f52 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7f32 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7h12 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7742 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7702 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7702p Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7662 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7642 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7552 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7542 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7532 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7502 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7502p Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7452 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7402 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7402p Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7352 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7302 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7302p Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7282 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7272 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7262 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7252 Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7232p Firmware	< romepi-sp3_1.0.0.c
Amd	Epyc 7763 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7713p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7713 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7663 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7643 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 75f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7543p Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7543 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7513 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7453 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 74f3 Firmware	< milanpi-sp3_1.0.0.4
Amd	Epyc 7443p Firmware	< milanpi-sp3_1.0.0.4

Showing 50 of 57 affected configurations. See NVD for the full list.

References

Timeline

Published: Nov 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26312?

How severe is CVE-2021-26312?

CVE-2021-26312 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26312?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26312?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST