Vulnerability in AMD EPYC™ 9004 Series Processors
CVSS score
5.9
EPSS probability
—
Risk score
0.6
Published
15 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%55
Short explanation
Improper access control in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to change the encryption bit of guest pages, potentially causing loss of integrity (S0).
The flaw endangers the security of virtual environments and puts data integrity at risk (S0).
What should be done?
- Monitor AMD security bulletins
- Apply vendor firmware updates when released
- Restrict hypervisor privileges
- Implement defense‑in‑depth measures
Chain of evidence and sources
Bu açık, kötü niyetli bir hipervizörün misafir sayfa şifreleme bitini değiştirerek bütünlük kaybına yol açabilir (S0).
Resmî kaynaklarda yama durumu doğrulanamadı; yama durumu UNKNOWN olarak rapor edilmiştir (S0).
Show the technical text from the sources
Improper Access Control Applied to Mirrored or Aliased Memory Regions in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to change the encryption bit for guest context pages potentially resulting in loss of integrity.
CVSS vector: 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
CWE: CWE-1257
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-28247 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | amd | AMD EPYC™ 9004 Series Processors | View |
| 2 | amd | AMD EPYC™ 7003 Series Processors | View |
| 3 | amd | AMD EPYC™ 9005 Series Processors | View |
| 4 | amd | AMD EPYC™ 8004 Series Processors | View |
| 5 | amd | AMD EPYC™ 8005 Series Processors | View |
| 6 | amd | AMD EPYC™ Embedded 7003 Series Processors | View |
| 7 | amd | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") | View |
| 8 | amd | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") | View |
| 9 | amd | AMD EPYC™ Embedded 8004 Series Processors | View |
| 10 | amd | AMD EPYC™ Embedded 9005 Series Processors | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 5.9 | CVSS V40 | MEDIUM | 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 | NVD |
| 5.9 | CVSS V4_0 | MEDIUM | 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 | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-28247 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-28247 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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