High severity · published Aug 13, 2024
CVE-2021-26344
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to…
8.2
CVSS
0.2%
EPSS
No
On KEV
Description
An out of bounds memory write when processing the AMD
PSP1 Configuration Block (APCB) could allow an attacker with access the ability
to modify the BIOS image, and the ability to sign the resulting image, to
potentially modify the APCB block resulting in arbitrary code execution.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7203 Firmware · Amd
before milanpi_1.0.0.5 · source: NVD
E7
Epyc 7203p Firmware · Amd
before milanpi_1.0.0.5 · source: NVD
E7
Epyc 7232p Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7252 Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7262 Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7272 Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7282 Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi_1.0.0.5 · source: NVD
E7
Epyc 7302 Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7302p Firmware · Amd
before romepi_1.0.0.c · source: NVD
E7
Epyc 7303 Firmware · Amd
before milanpi_1.0.0.5 · source: NVD
E7
Epyc 7303p Firmware · Amd
before milanpi_1.0.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26344
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26344
Vendor Advisory
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html
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