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CVE-2021-26406

HIGHCVSS 7.5/10EPSS 0.42%

Last modified

CVE-2021-26406 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service. . EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.42%

33.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
AmdEpyc 7232p Firmwareromepi_1.0.0.a
AmdEpyc 7252 Firmwareromepi_1.0.0.a
AmdEpyc 7262 Firmwareromepi_1.0.0.a
AmdEpyc 7272 Firmwareromepi_1.0.0.a
AmdEpyc 7282 Firmwareromepi_1.0.0.a
AmdEpyc 7302 Firmwareromepi_1.0.0.a
AmdEpyc 7302p Firmwareromepi_1.0.0.a
AmdEpyc 7352 Firmwareromepi_1.0.0.a
AmdEpyc 7402 Firmwareromepi_1.0.0.a
AmdEpyc 7402p Firmwareromepi_1.0.0.a
AmdEpyc 7452 Firmwareromepi_1.0.0.a
AmdEpyc 7502 Firmwareromepi_1.0.0.a
AmdEpyc 7502p Firmwareromepi_1.0.0.a
AmdEpyc 7532 Firmwareromepi_1.0.0.a
AmdEpyc 7542 Firmwareromepi_1.0.0.a
AmdEpyc 7552 Firmwareromepi_1.0.0.a
AmdEpyc 7642 Firmwareromepi_1.0.0.a
AmdEpyc 7662 Firmwareromepi_1.0.0.a
AmdEpyc 7702 Firmwareromepi_1.0.0.a
AmdEpyc 7702p Firmwareromepi_1.0.0.a
AmdEpyc 7742 Firmwareromepi_1.0.0.a
AmdEpyc 7f32 Firmwareromepi_1.0.0.a
AmdEpyc 7f52 Firmwareromepi_1.0.0.a
AmdEpyc 7f72 Firmwareromepi_1.0.0.a
AmdEpyc 7h12 Firmwareromepi_1.0.0.a
AmdEpyc 7251 Firmwarenaplespi_1.0.0.e
AmdEpyc 7261 Firmwarenaplespi_1.0.0.e
AmdEpyc 7281 Firmwarenaplespi_1.0.0.e
AmdEpyc 7301 Firmwarenaplespi_1.0.0.e
AmdEpyc 7351 Firmwarenaplespi_1.0.0.e
AmdEpyc 7351p Firmwarenaplespi_1.0.0.e
AmdEpyc 7371 Firmwarenaplespi_1.0.0.e
AmdEpyc 7401 Firmwarenaplespi_1.0.0.e
AmdEpyc 7401p Firmwarenaplespi_1.0.0.e
AmdEpyc 7451 Firmwarenaplespi_1.0.0.e
AmdEpyc 7501 Firmwarenaplespi_1.0.0.e
AmdEpyc 7551 Firmwarenaplespi_1.0.0.e
AmdEpyc 7551p Firmwarenaplespi_1.0.0.e
AmdEpyc 7571 Firmwarenaplespi_1.0.0.e
AmdEpyc 7601 Firmwarenaplespi_1.0.0.e

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26406?
Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.
How severe is CVE-2021-26406?
CVE-2021-26406 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26406?
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.

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Source: NVD / NIST