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Fencer Intel
medium 5.9

CVE-2024-21953 json

Improper input validation in IOMMU could allow a malicious hypervisor to reconfigure IOMMU registers resulting in loss of guest data integr…

published 9mo ago modified 4mo ago also EUVD-2024-19559

cvss
5.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

Improper input validation in IOMMU could allow a malicious hypervisor to reconfigure IOMMU registers resulting in loss of guest data integrity.

Patch / fix

  • AMD AMD EPYC™ 9004 Series Processors GenoaPI 1.0.0.F
  • AMD AMD EPYC™ 8004 Series Processors GenoaPI 1.0.0.F
  • AMD AMD EPYC™ Embedded 9004 Series Processors EmbGenoaPI-SP5 1.0.0.B
  • amd64-microcode Debian 14 3.20260923.1

debian advisories DEBIAN-CVE-2024-21953

Is CVE-2024-21953 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 5.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
CNA 4.0 5.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • AMD AMD EPYC™ 9004 Series Processors
  • AMD AMD EPYC™ 8004 Series Processors
  • AMD AMD EPYC™ Embedded 9004 Series Processors

Classification

Weakness
  • CWE-1284 Improper Validation of Specified Quantity in Input

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.