CVE-2023-20521
LOWAMD EPYC 7001 Series Firmware - Time-of-check Time-of-use Race Condition in ASP Bootloader
Title source: llmDescription
TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of service.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002
Vendor Advisory vendor-advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002
Vendor Advisory vendor-advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001
Scores
CVSS v3
3.3
EPSS
0.0004
EPSS Percentile
11.2%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-367
Status
published
Products (50)
amd/amd_3015ce_firmware
< pollockpi-ft5_1.0.0.4
amd/amd_3015e_firmware
< pollockpi-ft5_1.0.0.4
amd/athlon_gold_3150g_firmware
amd/athlon_gold_pro_3150g_firmware
amd/athlon_gold_pro_3150ge_firmware
amd/athlon_pro_300ge_firmware
amd/epyc_7001_firmware
< naplespi_1.0.0.h
amd/epyc_7203_firmware
< milanpi_1.0.0.7
amd/epyc_7203p_firmware
< milanpi_1.0.0.7
amd/epyc_7232p_firmware
< romepi_1.0.0.d
... and 40 more
Published
Nov 14, 2023
Tracked Since
Feb 18, 2026