AMD Epyc 8434p Firmware vulnerabilities

13 CVEs affecting AMD Epyc 8434p Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-20591, published 2024-08-13.

Highest priority

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

CVE-2021-46774, published 2023-11-14. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.
CVE-2024-21978, published 2024-08-05. High severity, CVSS 7.9. EPSS: 0.5% chance of exploitation in the next 30 days. Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption.
CVE-2023-31347, published 2024-02-13. Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days. Due to a code bug in Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a guest to observe an incorrect TSC when Secure TSC is enabled potentially resulting in a loss of…
CVE-2024-21980, published 2024-08-05. High severity, CVSS 7.9. EPSS: 0.4% chance of exploitation in the next 30 days. Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity.
CVE-2023-31355, published 2024-08-05. Medium severity, CVSS 6.0. EPSS: 0.4% chance of exploitation in the next 30 days. Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.
CVE-2021-26345, published 2023-11-14. Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days. Failure to validate the value in APCB may allow a privileged attacker to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.
CVE-2023-20566, published 2023-11-14. High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days. Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.
CVE-2022-23830, published 2023-11-14. Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days. SMM configuration may not be immutable, as intended, when SNP is enabled resulting in a potential limited loss of guest memory integrity.
CVE-2023-31346, published 2024-02-13. Medium severity, CVSS 6.0. EPSS: 0.3% chance of exploitation in the next 30 days. Failure to initialize memory in SEV Firmware may allow a privileged attacker to access stale data from other guests.
CVE-2023-20591, published 2024-08-13. Critical severity, CVSS 10.0. EPSS: 0.3% chance of exploitation in the next 30 days. Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to read or modify hypervisor memory, potentially resulting in…

Latest

CVE-2023-20584, published 2024-08-13. Medium severity, CVSS 6.0. EPSS: 0.2% chance of exploitation in the next 30 days. IOMMU improperly handles certain special address ranges with invalid device table entries (DTEs), which may allow an attacker with privileges and a compromised Hypervisor to induce DTE faults to…
CVE-2023-20578, published 2024-08-13. Medium severity, CVSS 6.4. EPSS: 0.1% chance of exploitation in the next 30 days. A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in…
CVE-2023-20573, published 2024-01-11. Low severity, CVSS 3.2. EPSS: 0.3% chance of exploitation in the next 30 days. A privileged attacker can prevent delivery of debug exceptions to SEV-SNP guests potentially resulting in guests not receiving expected debug information.