{
  "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"
}

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-46131"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:28Z",
    "severity": null
  },
  "details": "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": "GHSA-3wqm-qqw5-qr42",
  "modified": "2026-05-28T12:30:30Z",
  "published": "2026-05-28T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
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      "tlp": {
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        "url": "https://www.first.org/tlp/"
      }
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    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
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      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
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      {
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        "summary": "CVE-2026-46131 KVM: x86: check for nEPT/nNPT in slow flush hypercalls - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46131.json"
      },
      {
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        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "KVM: x86: check for nEPT/nNPT in slow flush hypercalls",
    "tracking": {
      "current_release_date": "2026-05-29T01:03:10.000Z",
      "generator": {
        "date": "2026-05-29T07:23:45.799Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-46131",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-29T01:03:10.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
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  },
  "product_tree": {
    "branches": [
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        "branches": [
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              {
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                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
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                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-46131",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-46131 KVM: x86: check for nEPT/nNPT in slow flush hypercalls - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46131.json"
        }
      ],
      "title": "KVM: x86: check for nEPT/nNPT in slow flush hypercalls"
    }
  ]
}