CVE-2026-31591
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as allowing userspace to manipulate and/or run a vCPU while its state is being synchronized would at best corrupt vCPU state, and at worst crash the host kernel. Opportunistically assert that vcpu->mutex is held when synchronizing its VMSA (the SEV-ES path already locks vCPUs).
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-04-24 15:16:36.480000
Last modified
2026-11-06 16:18:02.400000
View original CVE JSON
{
"id": "CVE-2026-31591",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-04-24T15:16:36.480",
"lastModified": "2026-11-06T16:18:02.400",
"vulnStatus": "Analyzed",
"cveTags": [],
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish\n\nLock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as\nallowing userspace to manipulate and/or run a vCPU while its state is being\nsynchronized would at best corrupt vCPU state, and at worst crash the host\nkernel.\n\nOpportunistically assert that vcpu->mutex is held when synchronizing its\nVMSA (the SEV-ES path already locks vCPUs)."
}
],
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
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"description": [
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"configurations": [
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