Amd Instinct Mi300A Series Processors
Monthly
Improper enforcement of the LFENCE serialization property may allow an attacker to bypass speculation barriers and potentially disclose sensitive information, potentially resulting in loss of. Rated medium severity (CVSS 5.7). No vendor patch available.
Local privilege escalation in the AMD Platform Configuration Blob (APCB) SMM driver, shipped in AGESA firmware across nearly the entire modern AMD EPYC, Ryzen, Threadripper, and Instinct MI300 line, lets a Ring 0 attacker escalate into System Management Mode (SMM) and potentially run arbitrary code below the operating system. The flaw stems from the SMM driver improperly invoking UEFI boot services, and AMD-reported it with a CVSS 4.0 base of 7.1; there is no public exploit identified at time of analysis and EPSS is negligible at 0.01%. Because SMM code runs at a higher trust level than the OS kernel, successful exploitation can undermine firmware integrity and any SMM-based security guarantees.
Improper enforcement of the LFENCE serialization property may allow an attacker to bypass speculation barriers and potentially disclose sensitive information, potentially resulting in loss of. Rated medium severity (CVSS 5.7). No vendor patch available.
Local privilege escalation in the AMD Platform Configuration Blob (APCB) SMM driver, shipped in AGESA firmware across nearly the entire modern AMD EPYC, Ryzen, Threadripper, and Instinct MI300 line, lets a Ring 0 attacker escalate into System Management Mode (SMM) and potentially run arbitrary code below the operating system. The flaw stems from the SMM driver improperly invoking UEFI boot services, and AMD-reported it with a CVSS 4.0 base of 7.1; there is no public exploit identified at time of analysis and EPSS is negligible at 0.01%. Because SMM code runs at a higher trust level than the OS kernel, successful exploitation can undermine firmware integrity and any SMM-based security guarantees.