Vulnerability-Lookup

CVE-2026-89932 (GCVE-0-2026-89932)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-09-16 14:40

Title

KVM: nVMX: Always flush vpid02 on first use

Summary

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.

Severity

8.8 (High)


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

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/26de0d2d9a8d14c03…
https://git.kernel.org/stable/c/8bc609999ec223089…
https://git.kernel.org/stable/c/62604376c31317881…
https://git.kernel.org/stable/c/8b98d662ab24f3471…
https://git.kernel.org/stable/c/22dfcc22c95e91295…
https://git.kernel.org/stable/c/121991d150735f3c0…
https://git.kernel.org/stable/c/f0772389413dce965…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8bc609999ec223089fec8d74c7de27d689606b36 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 62604376c313178811375f40a282fc2a46cd2311 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8b98d662ab24f34710a56e03bc9169e4a5508606 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 22dfcc22c95e91295119a1c3b469816ce44c4804 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 121991d150735f3c0f7401678ce4d35c5b4ac898 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f0772389413dce9657c7d6950abf3edbbd511356 (git) Affected: 0 , < 5.15.221 (semver) Affected: 0 , < 6.1.188 (semver) Affected: 0 , < 6.6.157 (semver) Affected: 0 , < 6.12.110 (semver) Affected: 0 , < 6.18.51 (semver) Affected: 0 , < 7.2.5 (semver)	guessed
Linux	Linux	Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/vmx/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "8bc609999ec223089fec8d74c7de27d689606b36",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "62604376c313178811375f40a282fc2a46cd2311",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "8b98d662ab24f34710a56e03bc9169e4a5508606",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "22dfcc22c95e91295119a1c3b469816ce44c4804",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "121991d150735f3c0f7401678ce4d35c5b4ac898",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f0772389413dce9657c7d6950abf3edbbd511356",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.157",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.110",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.51",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.2.5",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/vmx/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Always flush vpid02 on first use\n\nMake sure vpid02 is always flushed on first use by setting last_vpid=0\nwhen allocating vpid02.  nested_vmx_transition_tlb_flush() will always\ndetect a VPID change on first VM-Enter after VMXON, because VPID=0 in\nvmcs12 is not allowed if L1 enables VPID.\n\nThis avoids using stale TLB entries from a previous lifetime of the\nVPID, that might have been associated with a different vCPU (or a\ncompletely different VM).\n\nNote that last_vpid is already being initialized as 0 when the vCPU is\ncreated, but it is not reset when vpid02 is freed on VMXOFF. Hence, the\nproblem can only occur if L1 does VMXOFF -\u003e VMXON, runs an L2, and KVM\nhappens to reuse a VPID that has TLB entries on the physical CPU."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Reached when an L1 nested-VMX guest executes VMXOFF then VMXON and VMLAUNCH/VMRESUME on the host KVM_RUN path (handle_vmxon/enter_vmx_operation into nested_vmx_transition_tlb_flush); no network, adjacent-radio, or physical path hits nVMX VPID allocation.\nAC:L - The L1 attacker fully controls VMXOFF, VMXON, vmcs12 VPID, and vCPU pinning; allocate_vpid() is a deterministic global bitmap, nested VMX and VPID are default, and skipping last_vpid=0 makes the omitted INVVPID on first VM-Enter after VMXON reliably hit.\nPR:L - Needs /dev/kvm and nested VMX, typically a kvm-group user or cloud tenant running QEMU, not init-namespace root; handle_vmxon() only checks guest CPL=0 and CR4.VMXE, and KVM create/run ioctls have no CAP_SYS_ADMIN gate.\nUI:N - Once the attacker has a nested-capable VM, they trigger the flaw with their own VMXOFF/VMXON and VMLAUNCH; no separate victim action such as attaching a device or mounting a filesystem is required.\nS:C - Skipping the vpid02 INVVPID lets L2 use stale hardware TLB entries from a previous lifetime of that VPID, including another vCPU or a different VM, crossing KVM guest isolation so impact is outside L1\u0027s security authority.\nC:H - Reused vpid02 linear or combined TLB entries can translate L2 loads onto another VM\u0027s or recycled host physical pages, giving a read primitive over co-resident guest memory rather than a bounded pointer leak.\nI:H - The same stale translations apply to stores, so L2 can write through another VM\u0027s cached GPA/HPA mappings, corrupting co-resident guest memory and enabling control-flow hijack in the victim VM or further host compromise if pages were reused.\nA:H - Stale VPID hits produce wrong translations that surface as KVM internal/emulation failures and can oops or panic the host when walks land on recycled or unmapped host pages, denying service to the hypervisor and co-located VMs."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:40:23.502Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366"
        },
        {
          "url": "https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36"
        },
        {
          "url": "https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606"
        },
        {
          "url": "https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804"
        },
        {
          "url": "https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356"
        }
      ],
      "title": "KVM: nVMX: Always flush vpid02 on first use",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89932",
    "datePublished": "2026-09-16T10:32:22.886Z",
    "dateReserved": "2026-09-11T19:38:34.776Z",
    "dateUpdated": "2026-09-16T14:40:23.502Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "microsoft_vex": {
      "current_release_date": "2026-09-17T01:11:51.000Z",
      "cve": "CVE-2026-89932",
      "id": "msrc_CVE-2026-89932",
      "initial_release_date": "2026-09-17T01:11:51.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "KVM: nVMX: Always flush vpid02 on first use",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89932.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89932\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-16T11:17:02.543\",\"lastModified\":\"2026-09-16T15:18:19.077\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: nVMX: Always flush vpid02 on first use\\n\\nMake sure vpid02 is always flushed on first use by setting last_vpid=0\\nwhen allocating vpid02.  nested_vmx_transition_tlb_flush() will always\\ndetect a VPID change on first VM-Enter after VMXON, because VPID=0 in\\nvmcs12 is not allowed if L1 enables VPID.\\n\\nThis avoids using stale TLB entries from a previous lifetime of the\\nVPID, that might have been associated with a different vCPU (or a\\ncompletely different VM).\\n\\nNote that last_vpid is already being initialized as 0 when the vCPU is\\ncreated, but it is not reset when vpid02 is freed on VMXOFF. Hence, the\\nproblem can only occur if L1 does VMXOFF -\u003e VMXON, runs an L2, and KVM\\nhappens to reuse a VPID that has TLB entries on the physical CPU.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/x86/kvm/vmx/nested.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"8bc609999ec223089fec8d74c7de27d689606b36\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"62604376c313178811375f40a282fc2a46cd2311\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"8b98d662ab24f34710a56e03bc9169e4a5508606\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"22dfcc22c95e91295119a1c3b469816ce44c4804\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"121991d150735f3c0f7401678ce4d35c5b4ac898\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"f0772389413dce9657c7d6950abf3edbbd511356\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15.221\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.1.188\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.6.157\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.12.110\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.18.51\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.2.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/x86/kvm/vmx/nested.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.51\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.5\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.0,\"impactScore\":6.0}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-89932

Vulnerability from fkie_nvd - Published: 2026-09-16 11:17 - Updated: 2026-09-16 15:18

Severity

8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/vmx/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "8bc609999ec223089fec8d74c7de27d689606b36",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "62604376c313178811375f40a282fc2a46cd2311",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "8b98d662ab24f34710a56e03bc9169e4a5508606",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "22dfcc22c95e91295119a1c3b469816ce44c4804",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "121991d150735f3c0f7401678ce4d35c5b4ac898",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f0772389413dce9657c7d6950abf3edbbd511356",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.157",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.110",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.51",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.2.5",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/vmx/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Always flush vpid02 on first use\n\nMake sure vpid02 is always flushed on first use by setting last_vpid=0\nwhen allocating vpid02.  nested_vmx_transition_tlb_flush() will always\ndetect a VPID change on first VM-Enter after VMXON, because VPID=0 in\nvmcs12 is not allowed if L1 enables VPID.\n\nThis avoids using stale TLB entries from a previous lifetime of the\nVPID, that might have been associated with a different vCPU (or a\ncompletely different VM).\n\nNote that last_vpid is already being initialized as 0 when the vCPU is\ncreated, but it is not reset when vpid02 is freed on VMXOFF. Hence, the\nproblem can only occur if L1 does VMXOFF -\u003e VMXON, runs an L2, and KVM\nhappens to reuse a VPID that has TLB entries on the physical CPU."
    }
  ],
  "id": "CVE-2026-89932",
  "lastModified": "2026-09-16T15:18:19.077",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-16T11:17:02.543",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-8Q77-GPG3-WGRC

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 15:31

Details

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.

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89932"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:02Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Always flush vpid02 on first use\n\nMake sure vpid02 is always flushed on first use by setting last_vpid=0\nwhen allocating vpid02.  nested_vmx_transition_tlb_flush() will always\ndetect a VPID change on first VM-Enter after VMXON, because VPID=0 in\nvmcs12 is not allowed if L1 enables VPID.\n\nThis avoids using stale TLB entries from a previous lifetime of the\nVPID, that might have been associated with a different vCPU (or a\ncompletely different VM).\n\nNote that last_vpid is already being initialized as 0 when the vCPU is\ncreated, but it is not reset when vpid02 is freed on VMXOFF. Hence, the\nproblem can only occur if L1 does VMXOFF -\u003e VMXON, runs an L2, and KVM\nhappens to reuse a VPID that has TLB entries on the physical CPU.",
  "id": "GHSA-8q77-gpg3-wgrc",
  "modified": "2026-09-16T15:31:02Z",
  "published": "2026-09-16T12:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89932"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-89932

Vulnerability from csaf_microsoft - Published: 2026-09-17 01:11 - Updated: 2026-09-17 01:11

Summary

KVM: nVMX: Always flush vpid02 on first use

Scope

1 vulnerability in this advisory, including CVE-2026-89932.

CVE-2026-89932

8.8 (High)


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

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-89932 (GCVE-0-2026-89932)

FKIE_CVE-2026-89932

GHSA-8Q77-GPG3-WGRC

MSRC_CVE-2026-89932

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