Vulnerability · Published Nov 14, 2023 · Assigned by AMD
CVE-2023-20521
Low 3.3
In plain English
A low-severity security flaw in 1st Gen AMD EPYC™ Processors from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.3%top 81.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics “Picasso” AM4 | various |
| AMD | Ryzen™ Threadripper™ 2000 Series Processors “Colfax” | various |
| AMD | Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” FP5 | various |
| AMD | Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock” | various |
| AMD | Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics “Picasso” FP5 | various |
| AMD | 1st Gen AMD EPYC™ Processors | various |
| AMD | 2nd Gen AMD EPYC™ Processors | various |
| AMD | 3rd Gen AMD EPYC™ Processors | various |
| AMD | AMD EPYC™ Embedded 3000 | various |
| AMD | AMD EPYC™ Embedded 7002 | various |
| AMD | AMD EPYC™ Embedded 7003 | various |
| AMD | AMD Ryzen™ Embedded R1000 | various |
| AMD | AMD Ryzen™ Embedded R2000 | various |
| AMD | AMD Ryzen™ Embedded V1000 | various |