Vulnerability-Lookup

FKIE_CVE-2026-46131

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-05-28 13:44

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: check for nEPT/nNPT in slow flush hypercalls Checking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa() is only valid if an L2 guest is running *with nested EPT/NPT enabled*. Instead use the same condition as translate_nested_gpa() itself.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: check for nEPT/nNPT in slow flush hypercalls\n\nChecking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()\nis only valid if an L2 guest is running *with nested EPT/NPT enabled*.\nInstead use the same condition as translate_nested_gpa() itself."
    }
  ],
  "id": "CVE-2026-46131",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:28.663",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-46131 (GCVE-0-2026-46131)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:35 – Updated: 2026-05-28 09:35

Title

KVM: x86: check for nEPT/nNPT in slow flush hypercalls

Summary

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/971f17f5d91045404…
https://git.kernel.org/stable/c/45fc766bc756ff1d6…
https://git.kernel.org/stable/c/d6f4e217d663ede5b…
https://git.kernel.org/stable/c/4c7f8436b19a2a3ac…
https://git.kernel.org/stable/c/464af6fc2b1dcc740…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: aee738236dca0d0870789138ec494e15d6303566 , < 971f17f5d91045404e3914029ea57c3da90179a4 (git) Affected: aee738236dca0d0870789138ec494e15d6303566 , < 45fc766bc756ff1d66f8ca026a9c4f7f764adfae (git) Affected: aee738236dca0d0870789138ec494e15d6303566 , < d6f4e217d663ede5becc2fd6cb612c749677387b (git) Affected: aee738236dca0d0870789138ec494e15d6303566 , < 4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57 (git) Affected: aee738236dca0d0870789138ec494e15d6303566 , < 464af6fc2b1dcc74005b7f58ee3812b17777efee (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/hyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "971f17f5d91045404e3914029ea57c3da90179a4",
              "status": "affected",
              "version": "aee738236dca0d0870789138ec494e15d6303566",
              "versionType": "git"
            },
            {
              "lessThan": "45fc766bc756ff1d66f8ca026a9c4f7f764adfae",
              "status": "affected",
              "version": "aee738236dca0d0870789138ec494e15d6303566",
              "versionType": "git"
            },
            {
              "lessThan": "d6f4e217d663ede5becc2fd6cb612c749677387b",
              "status": "affected",
              "version": "aee738236dca0d0870789138ec494e15d6303566",
              "versionType": "git"
            },
            {
              "lessThan": "4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57",
              "status": "affected",
              "version": "aee738236dca0d0870789138ec494e15d6303566",
              "versionType": "git"
            },
            {
              "lessThan": "464af6fc2b1dcc74005b7f58ee3812b17777efee",
              "status": "affected",
              "version": "aee738236dca0d0870789138ec494e15d6303566",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/hyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.88",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.30",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc3",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: check for nEPT/nNPT in slow flush hypercalls\n\nChecking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()\nis only valid if an L2 guest is running *with nested EPT/NPT enabled*.\nInstead use the same condition as translate_nested_gpa() itself."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:35:46.220Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae"
        },
        {
          "url": "https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57"
        },
        {
          "url": "https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee"
        }
      ],
      "title": "KVM: x86: check for nEPT/nNPT in slow flush hypercalls",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46131",
    "datePublished": "2026-05-28T09:35:46.220Z",
    "dateReserved": "2026-05-13T15:03:33.099Z",
    "dateUpdated": "2026-05-28T09:35:46.220Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

FKIE_CVE-2026-46131

CVE-2026-46131 (GCVE-0-2026-46131)

Tags

Sightings

Nomenclature