Bug 2571341 (CVE-2025-54506)

Summary: CVE-2025-54506 amd-sev: AMD SEV: Loss of guest integrity via TOCTOU race condition
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the AMD Secure Encrypted Virtualization (SEV) firmware. A time-of-check to time-of-use (TOCTOU) race condition allows a local attacker with administrative privileges to bypass security checks on memory scatter lists. This vulnerability can be exploited to compromise the integrity of guest virtual machines.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 21:52:02 UTC
A time-of-check to time-of-use (TOCTOU) race condition in the AMD SEV Secure Encrypted Virtualization (SEV) firmware could allow an attacker with administrative privileges to bypass security checks on scatter lists, potentially resulting in loss of guest integrity.