KVM: nVMX: Hide shadow VMCS right after VMCLEAR

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64562
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 07:16:31 UTC
Updated2026-08-19 17:20:15 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR. The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.001200000 probability, percentile 0.021720000 (date 2026-08-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 b82c3144d8264265448292ca406f60bafeba3b6f git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 4f50e6aec16f69627dbad5704d1e90a255d766a7 git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 dc3eecfa219ebc9d01eaf7d1abd1441efe884dab git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 af56298e9d86e6098cd1d2e155cb2949b7c45412 git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 589419470030a89f16cf19300658b6dc644ca946 git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 8001d2ce9d9bd09118ce523aef595aa094573ae3 git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 1dabef6e206568bf9d9ade74f6e56a48ea35695d git Not specified
CNA Linux Linux affected 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 git Not specified
CNA Linux Linux affected 4.9 Not specified
CNA Linux Linux unaffected 4.9 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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