AMD Ryzen 5 2700x Firmware vulnerabilities

11 CVEs affecting AMD Ryzen 5 2700x Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-20559, published 2023-04-02.

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

• CVE-2022-29900, published 2022-07-12. Medium severity, CVSS 6.5. EPSS: 3.9% chance of exploitation in the next 30 days. Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions.
• CVE-2022-23823, published 2022-06-15. Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days. A potential vulnerability in some AMD processors using frequency scaling may allow an authenticated attacker to execute a timing attack to potentially enable information disclosure.
• CVE-2022-23825, published 2022-07-14. Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days. Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.
• CVE-2023-20559, published 2023-04-02. High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days. Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.
• CVE-2023-20558, published 2023-04-02. High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days. Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to an escalation of privileges.
• CVE-2022-23824, published 2022-11-09. Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days. IBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure.
• CVE-2021-26316, published 2023-01-11. High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days. Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code…
• CVE-2021-26390, published 2022-05-10. Medium severity, CVSS 6.2. EPSS: 0.2% chance of exploitation in the next 30 days. A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.
• CVE-2021-46778, published 2022-08-10. Medium severity, CVSS 5.6. EPSS: 0.2% chance of exploitation in the next 30 days. Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2” and “Zen 3” that use simultaneous multithreading (SMT). By…
• CVE-2021-26352, published 2022-05-10. Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days. Insufficient bound checks in System Management Unit (SMU) PCIe Hot Plug table may result in access/updates from/to invalid address space that could result in denial of service.

Latest

• CVE-2021-26384, published 2022-07-14. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when…