CVE-2026-40670
Last modified
CVE-2026-40670 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Improper check for unusual or exceptional conditions in AMD Secure Encrypted Virtualization - Secure Nested Paging (SEV-SNP) could allow a privileged attacker to potentially overlap MMIO regions with DRAM regions resulting in loss of integrity.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
Description
Improper check for unusual or exceptional conditions in AMD Secure Encrypted Virtualization - Secure Nested Paging (SEV-SNP) could allow a privileged attacker to potentially overlap MMIO regions with DRAM regions resulting in loss of integrity.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| AMD | AMD EPYC™ 9004 Series Processors | All versions |
| AMD | AMD EPYC™ 7003 Series Processors | All versions |
| AMD | AMD EPYC™ 9005 Series Processors | All versions |
| AMD | AMD EPYC™ 8004 Series Processors | All versions |
| AMD | AMD EPYC™ 8005 Series Processors | All versions |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | All versions |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") | All versions |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") | All versions |
| AMD | AMD EPYC™ Embedded 8004 Series Processors | All versions |
| AMD | AMD EPYC™ Embedded 9005 Series Processors | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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