KVM: nVMX: Always flush vpid02 on first use
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.
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