Medium severity · published May 9, 2023
CVE-2021-46792
Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to create a race condition causing the ASP bootloader to perform…
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
Time-of-check Time-of-use (TOCTOU) in the
BIOS2PSP command may allow an attacker with a malicious BIOS to create a race
condition causing the ASP bootloader to perform out-of-bounds SRAM reads upon
an S3 resume event potentially leading to a denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
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 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AG
Athlon Gold 3150g Firmware · Amd
picassopi-fp5_1.0.0.4 · source: NVD
AG
Athlon Gold 3150ge Firmware · Amd
picassopi-fp5_1.0.0.4 · source: NVD
AS
Athlon Silver 3050ge Firmware · Amd
picassopi-fp5_1.0.0.4 · source: NVD
R1
Ryzen 1200 (af) Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R1
Ryzen 1600 (af) Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2200g Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2200ge Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2300x Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2400g Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2400ge Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2500x Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
R2
Ryzen 2600 Firmware · Amd
pinnaclepi-am4_1.0.0.7; raven-fp5-am4_1.0.0.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-46792
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-46792
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
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