CVE-2025-61971

Insufficient Lock‑Bit Protection Enabling Unauthorized MMIO Routing Modification

Published May 13, 2026 CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
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Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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Vendors & Products Amd
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Title Insufficient Lock‑Bit Protection Enabling Unauthorized MMIO Routing Modification
Type Values Removed Values Added
Description 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.
Weaknesses CWE-1233
References
Metrics cvssV4_0

{'score': 5.9, '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'}