KVM: SEV: Protect *all* of sev_mem_enc_register_region() with kvm->lock
CVE-2026-31592 is a vulnerability related to the KVM SEV (Secure Encrypted Virtualization) feature where the function sev_mem_enc_register_region() is not fully protected by the kvm->lock. This could potentially lead to concurrency issues in the management of encrypted memory regions. The vulnerability affects Microsoft products with versions 2.0 and 3.0. No CVSS score is provided, and there is no indication of known exploits in the wild or available patches.
AI Analysis
Technical Summary
This vulnerability involves insufficient locking in the KVM SEV implementation, specifically that the entire sev_mem_enc_register_region() function is not protected by the kvm->lock, which is intended to serialize access to KVM structures. The lack of full locking could lead to race conditions or inconsistent state in the handling of encrypted memory regions within virtual machines. The affected products are Microsoft versions 2.0 and 3.0. No detailed technical exploitation or impact scenarios are provided in the source data.
Potential Impact
The impact could involve potential race conditions or inconsistent memory encryption state in virtualized environments using KVM SEV, which might affect confidentiality or integrity of virtual machine memory. However, no specific exploitation or impact details are provided, and no known exploits are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory (msrc_CVE-2026-31592) for current remediation guidance. No official fix or workaround information is provided in the available data.
KVM: SEV: Protect *all* of sev_mem_enc_register_region() with kvm->lock
Description
CVE-2026-31592 is a vulnerability related to the KVM SEV (Secure Encrypted Virtualization) feature where the function sev_mem_enc_register_region() is not fully protected by the kvm->lock. This could potentially lead to concurrency issues in the management of encrypted memory regions. The vulnerability affects Microsoft products with versions 2.0 and 3.0. No CVSS score is provided, and there is no indication of known exploits in the wild or available patches.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves insufficient locking in the KVM SEV implementation, specifically that the entire sev_mem_enc_register_region() function is not protected by the kvm->lock, which is intended to serialize access to KVM structures. The lack of full locking could lead to race conditions or inconsistent state in the handling of encrypted memory regions within virtual machines. The affected products are Microsoft versions 2.0 and 3.0. No detailed technical exploitation or impact scenarios are provided in the source data.
Potential Impact
The impact could involve potential race conditions or inconsistent memory encryption state in virtualized environments using KVM SEV, which might affect confidentiality or integrity of virtual machine memory. However, no specific exploitation or impact details are provided, and no known exploits are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory (msrc_CVE-2026-31592) for current remediation guidance. No official fix or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-31592
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a42ed9127e9c7971996581e
Added to database: 06/29/2026, 22:11:29 UTC
Last enriched: 06/29/2026, 22:58:18 UTC
Last updated: 06/29/2026, 23:11:11 UTC
Views: 3
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