CVE-2025-61971
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2025-61971- CVSS 4.0
- 5.9 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 - Weakness
- CWE-1233
- Updated
- 2026-11-02
EUVDEUVD-2025-209811
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.
- Record
EUVD-2025-209811- CVSS 4.0
- 5.9 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 - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-61971- CVSS 4.0
- 5.9 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 - Weakness
- CWE-1233
- Updated
- 2026-11-02
Affected products
- amd epyc™ 7003 series processors
- amd epyc™ 8004 series processors
- amd epyc™ 9004 series processors
- amd epyc™ 9005 series processors
- amd epyc™ embedded 7003 series processors
- amd epyc™ embedded 8004 series processors
- amd epyc™ embedded 9004 series processors (formerly codenamed "genoa")
- amd epyc™ embedded 9004 series processors (formerly codenamed "bergamo")
- amd epyc™ embedded 9005 series processors
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-61971 is a medium vulnerability (CVSS 5.9) in Amd Epyc™ 7003 Series Processors, published May 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.