fkie_nvd - fkie_cve-2025-40065

FKIE_CVE-2025-40065

Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2025-10-30 15:05

Severity ?

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2b351e3d04be9e1533f26c3464f1e44a5beace30
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2025-40065",
  "lastModified": "2025-10-30T15:05:32.197",
  "metrics": {},
  "published": "2025-10-28T12:15:40.950",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2b351e3d04be9e1533f26c3464f1e44a5beace30"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

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

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2025-12-01 06:17

Title

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

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d00b61cd37f4c183c…
	https://git.kernel.org/stable/c/2b351e3d04be9e153…

Impacted products

Vendor

Product

Version

Linux

Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357 (git)
Affected: fd7bb4a251dfc1da3496bf59a4793937c13e8c1f , < 2b351e3d04be9e1533f26c3464f1e44a5beace30 (git)

Linux

Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "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": "d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357",
              "status": "affected",
              "version": "fd7bb4a251dfc1da3496bf59a4793937c13e8c1f",
              "versionType": "git"
            },
            {
              "lessThan": "2b351e3d04be9e1533f26c3464f1e44a5beace30",
              "status": "affected",
              "version": "fd7bb4a251dfc1da3496bf59a4793937c13e8c1f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/riscv/kvm/vmid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "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": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.3",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-01T06:17:15.902Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b351e3d04be9e1533f26c3464f1e44a5beace30"
        }
      ],
      "title": "RISC-V: KVM: Write hgatp register with valid mode bits",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40065",
    "datePublished": "2025-10-28T11:48:35.785Z",
    "dateReserved": "2025-04-16T07:20:57.159Z",
    "dateUpdated": "2025-12-01T06:17:15.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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-2025-40065

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

Tags

Sightings

Nomenclature