Critical severity · published May 9, 2023
CVE-2021-26379
Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to a loss of integrity and privilege…
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
Insufficient input validation of mailbox data in the
SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially
leading to a loss of integrity and privilege escalation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7232p Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7252 Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7262 Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7272 Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7282 Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi_1.0.0.9 · source: NVD
E7
Epyc 7302 Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7302p Firmware · Amd
before romepi_1.0.0.e · source: NVD
E7
Epyc 7313 Firmware · Amd
before milanpi_1.0.0.9 · source: NVD
E7
Epyc 7313p Firmware · Amd
before milanpi_1.0.0.9 · source: NVD
E7
Epyc 7343 Firmware · Amd
before milanpi_1.0.0.9 · source: NVD
E7
Epyc 7352 Firmware · Amd
before romepi_1.0.0.e · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26379
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26379
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
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