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CVE-2021-26320

MEDIUMCVSS 5.5/10EPSS 0.18%

Last modified

CVE-2021-26320 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP

Metrics

CVSS 3.1
5.5/10

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

EPSS Probability
0.18%

7.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

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

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

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26320?
Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP
How severe is CVE-2021-26320?
CVE-2021-26320 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26320?
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-2021-26320?

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Source: NVD / NIST