AMD DIMM SPD validation flaw allows guest memory overwrite
CVE-2024-21944 Published on June 10, 2026
Improper input validation for DIMM serial presence detect (SPD) metadata could allow an attacker with physical access, ring0 access on a system with a non-compliant DIMM, or control over the Root of Trust for BIOS update, to potentially overwrite guest memory resulting in loss of guest data integrity.
Vulnerability Analysis
CVE-2024-21944 is exploitable with local system access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected Versions
AMD EPYC™ 7003 Series Processors:- Version Milan PI 1.0.0.D is unaffected.
- Version SEV FW 1.55.22 (hex 1.37.16) is unaffected.
- Version Genoa PI 1.0.0.D is unaffected.
- Version SEV FW 1.55.38 (hex 1.37.26) is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.