Missing lock bit protection for NBIO registers could allow a local admin-privileged…
Priority LOW 25CWE-1233Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
Missing lock bit protection for NBIO registers could allow a local admin-privileged attacker to modify MMIO routing configurations, potentially resulting in loss of SEV-SNP guest integrity.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00116 1st percentileScored 2026-11-07
Fix Partial AMD EPYC™ 9004 Series Processors (AMD): GenoaPI_1.0.0.HAMD EPYC™ 7003 Series Processors (AMD): MilanPI-SP3_1.0.0.J+7 more productsRed Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AMD | AMD EPYC™ 9004 Series Processors | — | GenoaPI_1.0.0.H | Patch available | CNA |
| AMD | AMD EPYC™ 7003 Series Processors | — | MilanPI-SP3_1.0.0.J | Patch available | CNA |
| AMD | AMD EPYC™ 9005 Series Processors | — | TurinPI_1.0.0.8 | Patch available | CNA |
| AMD | AMD EPYC™ 8004 Series Processors | — | GenoaPI_1.0.0.H | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | — | EmbMilanPI-SP3 1.0.0.D | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") | — | EmbGenoaPI-SP5 1.0.0.D | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") | — | EmbGenoaPI-SP5 1.0.0.D | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 8004 Series Processors | — | EmbGenoaPI-SP5 1.0.0.D | Patch available | CNA |
| AMD | AMD EPYC™ Embedded 9005 Series Processors | — | EmbeddedTurinPI_SP5_1004 | Patch available | CNA |
- AMD EPYC™ 9004 Series Processors VendorAMD Affected — Fixed in GenoaPI_1.0.0.H Patch available CNA
- AMD EPYC™ 7003 Series Processors VendorAMD Affected — Fixed in MilanPI-SP3_1.0.0.J Patch available CNA
- AMD EPYC™ 9005 Series Processors VendorAMD Affected — Fixed in TurinPI_1.0.0.8 Patch available CNA
- AMD EPYC™ 8004 Series Processors VendorAMD Affected — Fixed in GenoaPI_1.0.0.H Patch available CNA
- AMD EPYC™ Embedded 7003 Series Processors VendorAMD Affected — Fixed in EmbMilanPI-SP3 1.0.0.D Patch available CNA
- AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") VendorAMD Affected — Fixed in EmbGenoaPI-SP5 1.0.0.D Patch available CNA
- AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") VendorAMD Affected — Fixed in EmbGenoaPI-SP5 1.0.0.D Patch available CNA
- AMD EPYC™ Embedded 8004 Series Processors VendorAMD Affected — Fixed in EmbGenoaPI-SP5 1.0.0.D Patch available CNA
- AMD EPYC™ Embedded 9005 Series Processors VendorAMD Affected — Fixed in EmbeddedTurinPI_SP5_1004 Patch available CNA
Remediation
- Fix · CNA AMD EPYC™ 9004 Series Processors (AMD) Fixed in GenoaPI_1.0.0.H
- Fix · CNA AMD EPYC™ 7003 Series Processors (AMD) Fixed in MilanPI-SP3_1.0.0.J
- Fix · CNA AMD EPYC™ 9005 Series Processors (AMD) Fixed in TurinPI_1.0.0.8
- Fix · CNA AMD EPYC™ 8004 Series Processors (AMD) Fixed in GenoaPI_1.0.0.H
- Fix · CNA AMD EPYC™ Embedded 7003 Series Processors (AMD) Fixed in EmbMilanPI-SP3 1.0.0.D
- Fix · CNA AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") (AMD) Fixed in EmbGenoaPI-SP5 1.0.0.D
- Fix · CNA AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") (AMD) Fixed in EmbGenoaPI-SP5 1.0.0.D
- Fix · CNA AMD EPYC™ Embedded 8004 Series Processors (AMD) Fixed in EmbGenoaPI-SP5 1.0.0.D
- Fix · CNA AMD EPYC™ Embedded 9005 Series Processors (AMD) Fixed in EmbeddedTurinPI_SP5_1004
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-61971
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Sources
- CVE-2025-61971 · CVE Program
- CVE-2025-61971 · NVD
- FIRST EPSS
- CVE-2025-61971 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences