Medium severity · published Nov 16, 2021
CVE-2021-26337
Insufficient DRAM address validation in System Management Unit (SMU) may result in a DMA read from invalid DRAM address to SRAM resulting in SMU not servicing further requests
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Insufficient DRAM address validation in System Management Unit (SMU) may result in a DMA read from invalid DRAM address to SRAM resulting in SMU not servicing further requests.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7002 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7003 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7232p Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7252 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7262 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7272 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7282 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7302 Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7302p Firmware · Amd
before romepi-sp3_1.0.0.c · source: NVD
E7
Epyc 7313 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7313p Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26337
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26337
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027
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