AMD Epyc 7571 Firmware vulnerabilities

4 CVEs affecting AMD Epyc 7571 Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-20588, published 2023-08-08.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2023-20588, published 2023-08-08. Medium severity, CVSS 5.5. EPSS: 11.2% chance of exploitation in the next 30 days. A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality.
CVE-2023-20520, published 2023-05-09. Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days. 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.
CVE-2021-46756, published 2023-05-09. Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days. Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the…
CVE-2021-26406, published 2023-05-09. High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days. Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially…