Skip to content
Fencer Intel
medium 4.6

CVE-2026-28249 json

Improper preservation of consistency between independent representations of shared state in AMD Secure Encrypted Virtualization (SEV) firmw…

published yesterday modified yesterday also EUVD-2026-123043

cvss
4.6
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 4%
public exploits
0
none known

Summary

Improper preservation of consistency between independent representations of shared state in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to potentially affect cache coherency for guest context pages resulting in loss of integrity.

Patch / fix

  • AMD AMD EPYC™ 9004 Series Processors GenoaPI_1.0.0.J
  • AMD AMD EPYC™ 7003 Series Processors MilanPI-SP3_1.0.0.K
  • AMD AMD EPYC™ 8004 Series Processors GenoaPI_1.0.0.J
  • AMD AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 1.0.0.E
  • AMD AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") EmbeddedGenoaPI_1.0.0.E
  • AMD AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") EmbeddedGenoaPI_1.0.0.E
  • AMD AMD EPYC™ Embedded 8004 Series Processors EmbeddedGenoaPI_1.0.0.E

Is CVE-2026-28249 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.

Check with Fencer

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 4.6 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N
CNA 4.0 4.6 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/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™ 7003 Series Processors
  • AMD AMD EPYC™ 8004 Series Processors
  • AMD AMD EPYC™ Embedded 7003 Series Processors
  • AMD AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa")
  • AMD AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo")
  • AMD AMD EPYC™ Embedded 8004 Series Processors

Classification

Weakness
  • CWE-1250 Improper Preservation of Consistency Between Independent Representations of Shared State

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.