Vulnerability-Lookup

GHSA-M7W6-FMW8-2V8X

Vulnerability from github – Published: 2025-10-28 12:30 – Updated: 2026-10-21 15:40

Details

In the Linux kernel, the following vulnerability has been resolved:

RISC-V: KVM: Write hgatp register with valid mode bits

According to the RISC-V Privileged Architecture Spec, when MODE=Bare is selected,software must write zero to the remaining fields of hgatp.

We have detected the valid mode supported by the HW before, So using a valid mode to detect how many vmid bits are supported.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40065"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-28T12:15:40Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRISC-V: KVM: Write hgatp register with valid mode bits\n\nAccording to the RISC-V Privileged Architecture Spec, when MODE=Bare\nis selected,software must write zero to the remaining fields of hgatp.\n\nWe have detected the valid mode supported by the HW before, So using a\nvalid mode to detect how many vmid bits are supported.",
  "id": "GHSA-m7w6-fmw8-2v8x",
  "modified": "2026-10-21T15:40:11Z",
  "published": "2025-10-28T12:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40065"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b351e3d04be9e1533f26c3464f1e44a5beace30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cba8ae00279296a586d0596443109d601b1d116"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b6e327736db013b9e385c3f6f9f0b04ddf26e43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40065 (GCVE-0-2025-40065)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-10-21 12:37

Title

RISC-V: KVM: Write hgatp register with valid mode bits

Summary

In the Linux kernel, the following vulnerability has been resolved: RISC-V: KVM: Write hgatp register with valid mode bits According to the RISC-V Privileged Architecture Spec, when MODE=Bare is selected,software must write zero to the remaining fields of hgatp. We have detected the valid mode supported by the HW before, So using a valid mode to detect how many vmid bits are supported.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7063 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/8b6e327736db013b9…
https://git.kernel.org/stable/c/5cba8ae00279296a5…
https://git.kernel.org/stable/c/d00b61cd37f4c183c…
https://git.kernel.org/stable/c/2b351e3d04be9e153…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < 8b6e327736db013b9e385c3f6f9f0b04ddf26e43 (git) Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < 5cba8ae00279296a586d0596443109d601b1d116 (git) Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357 (git) Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < 2b351e3d04be9e1533f26c3464f1e44a5beace30 (git)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.114 , ≤ 6.12.* (semver) Unaffected: 6.17.3 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kvm/vmid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8b6e327736db013b9e385c3f6f9f0b04ddf26e43",
              "status": "affected",
              "version": "fd7bb4a251dfc1da3496bf59a4793937c13e8c1f",
              "versionType": "git"
            },
            {
              "lessThan": "5cba8ae00279296a586d0596443109d601b1d116",
              "status": "affected",
              "version": "fd7bb4a251dfc1da3496bf59a4793937c13e8c1f",
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            },
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:37:44.298Z",
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    "datePublished": "2025-10-28T11:48:35.785Z",
    "dateReserved": "2025-04-16T07:20:57.159Z",
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}

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.

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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.
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