High severity · published May 9, 2023
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…
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7232p Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7251 Firmware · Amd
naplespi_1.0.0.e · source: NVD
E7
Epyc 7252 Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7261 Firmware · Amd
naplespi_1.0.0.e · source: NVD
E7
Epyc 7262 Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7272 Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7281 Firmware · Amd
naplespi_1.0.0.e · source: NVD
E7
Epyc 7282 Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7301 Firmware · Amd
naplespi_1.0.0.e · source: NVD
E7
Epyc 7302 Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7302p Firmware · Amd
romepi_1.0.0.a · source: NVD
E7
Epyc 7351 Firmware · Amd
naplespi_1.0.0.e · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26406
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26406
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
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