Vulnerability · Published May 9, 2023 · Assigned by AMD
CVE-2023-20520
Critical 9.8
In plain English
A critical-severity out-of-bounds write in 1st Gen AMD EPYC™ from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 43.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-based buffer overrun potentially leading to arbitrary code execution.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | 1st Gen AMD EPYC™ | various |
| AMD | 2nd Gen AMD EPYC™ | various |
| AMD | 3rd Gen AMD EPYC™ | various |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H