Medium severity · published Jan 11, 2023
CVE-2021-26355
Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7003 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7313 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7313p Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7343 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7373x Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 73f3 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7413 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7443 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7443p Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 7453 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
E7
Epyc 74f3 Firmware · Amd
before milanpi-sp3_1.0.0.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26355
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26355
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
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