Skip to content
Heist/ feed
High

KVM: nVMX: Always flush vpid02 on first use

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Always flush vpid02 on first use Make sure vpid02 is always flushed on first use by setting last_vpid=0 when allocating vpid02. nested_vmx_transition_tlb_flush() will always detect a VPID change on first VM-Enter after VMXON, because VPID=0 in vmcs12 is not allowed if L1 enables VPID. This avoids using stale TLB entries from a previous lifetime of the VPID, that might have been associated with a different vCPU (or a completely different VM). Note that last_vpid is already being initialized as 0 when the vCPU is created, but it is not reset when vpid02 is freed on VMXOFF. Hence, the problem can only occur if L1 does VMXOFF -> VMXON, runs an L2, and KVM happens to reuse a VPID that has TLB entries on the physical CPU.

Announced Source revision 1
Original source ↗

CVE-2026-89932

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-2026-89932

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": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "8bc609999ec223089fec8d74c7de27d689606b36",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "62604376c313178811375f40a282fc2a46cd2311",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "8b98d662ab24f34710a56e03bc9169e4a5508606",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "22dfcc22c95e91295119a1c3b469816ce44c4804",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "121991d150735f3c0f7401678ce4d35c5b4ac898",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5c614b3583e7b6dab0c86356fa36c2bcbb8322a0",
        "lessThan": "f0772389413dce9657c7d6950abf3edbbd511356",
        "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": "4.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.4",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/x86/kvm/vmx/nested.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89932

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36374 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement