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KVM: nVMX: Hide shadow VMCS right after VMCLEAR

Type: advisorySource: Official CVE List1 source record

In 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.

Announced Source revision 1
Original source ↗

CVE-2026-64562

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-64562

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "b82c3144d8264265448292ca406f60bafeba3b6f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "4f50e6aec16f69627dbad5704d1e90a255d766a7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "dc3eecfa219ebc9d01eaf7d1abd1441efe884dab",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "af56298e9d86e6098cd1d2e155cb2949b7c45412",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "589419470030a89f16cf19300658b6dc644ca946",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "8001d2ce9d9bd09118ce523aef595aa094573ae3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "1dabef6e206568bf9d9ade74f6e56a48ea35695d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "355f4fb1405ec29d0fac49b4d41fcd78cbd455d5",
        "lessThan": "622ebfac01ba4f9c0060cebd41257fe46fc4a0b3",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "arch/x86/kvm/vmx/nested.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/x86/kvm/vmx/nested.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64562

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41089 · Revision 1
Added to Heist Feed
Publisher date
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