AMD Ryzen 5 5500h Firmware vulnerabilities

7 CVEs affecting AMD Ryzen 5 5500h Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-20596, published 2023-11-14.

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

• CVE-2023-20596, published 2023-11-14. Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days. Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0 access potentially leading to arbitrary code execution.
• CVE-2022-23821, published 2023-11-14. Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days. Improper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.
• CVE-2022-23820, published 2023-11-14. Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days. Failure to validate the AMD SMM communication buffer may allow an attacker to corrupt the SMRAM potentially leading to arbitrary code execution.
• CVE-2023-20571, published 2023-11-14. High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days. A race condition in System Management Mode (SMM) code may allow an attacker using a compromised user space to leverage CVE-2018-8897 potentially resulting in privilege escalation.
• CVE-2021-46758, published 2023-11-14. Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days. Insufficient validation of SPI flash addresses in the ASP (AMD Secure Processor) bootloader may allow an attacker to read data in memory mapped beyond SPI flash resulting in a potential loss of…
• CVE-2023-20565, published 2023-11-14. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. Insufficient protections in System Management Mode (SMM) code may allow an attacker to potentially enable escalation of privilege via local access.
• CVE-2023-20563, published 2023-11-14. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. Insufficient protections in System Management Mode (SMM) code may allow an attacker to potentially enable escalation of privilege via local access.