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Fencer Intel
medium 5.3

CVE-2024-21944 json

Improper input validation for DIMM serial presence detect (SPD) metadata could allow an attacker with physical access, ring0 access on a sy…

published 5mo ago modified 3mo ago also EUVD-2024-55617

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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.

Patch / fix

  • AMD AMD EPYC™ 7003 Series Processors Milan PI 1.0.0.D, SEV FW 1.55.22 (hex 1.37.16)
  • AMD AMD EPYC™ 9004 Series Processor Genoa PI 1.0.0.D, SEV FW 1.55.38 (hex 1.37.26)

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N

Affected products

  • AMD AMD EPYC™ 7003 Series Processors
  • AMD AMD EPYC™ 9004 Series Processor

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.