Vulnerability-Lookup

GHSA-GH3F-X9JP-JMHP

Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-05-03 09:33

Details

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

drm/amdgpu: validate doorbell_offset in user queue creation

amdgpu_userq_get_doorbell_index() passes the user-provided doorbell_offset to amdgpu_doorbell_index_on_bar() without bounds checking. An arbitrarily large doorbell_offset can cause the calculated doorbell index to fall outside the allocated doorbell BO, potentially corrupting kernel doorbell space.

Validate that doorbell_offset falls within the doorbell BO before computing the BAR index, using u64 arithmetic to prevent overflow.

(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)

Severity ?

7.1 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31766"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-01T15:16:39Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: validate doorbell_offset in user queue creation\n\namdgpu_userq_get_doorbell_index() passes the user-provided\ndoorbell_offset to amdgpu_doorbell_index_on_bar() without bounds\nchecking. An arbitrarily large doorbell_offset can cause the\ncalculated doorbell index to fall outside the allocated doorbell BO,\npotentially corrupting kernel doorbell space.\n\nValidate that doorbell_offset falls within the doorbell BO before\ncomputing the BAR index, using u64 arithmetic to prevent overflow.\n\n(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)",
  "id": "GHSA-gh3f-x9jp-jmhp",
  "modified": "2026-05-03T09:33:10Z",
  "published": "2026-05-01T15:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31766"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-31766 (GCVE-0-2026-31766)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-11 22:15

Title

drm/amdgpu: validate doorbell_offset in user queue creation

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate doorbell_offset in user queue creation amdgpu_userq_get_doorbell_index() passes the user-provided doorbell_offset to amdgpu_doorbell_index_on_bar() without bounds checking. An arbitrarily large doorbell_offset can cause the calculated doorbell index to fall outside the allocated doorbell BO, potentially corrupting kernel doorbell space. Validate that doorbell_offset falls within the doorbell BO before computing the BAR index, using u64 arithmetic to prevent overflow. (cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)

Severity ?

7.1 (High)


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

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/3543005a42d7e8e12…
https://git.kernel.org/stable/c/86b732fbc37ce4fb7…
https://git.kernel.org/stable/c/a018d1819f158991b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 , < 3543005a42d7e8e12b21897ef6798541bf7cbcd3 (git) Affected: f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 , < 86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6 (git) Affected: f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 , < a018d1819f158991b7308e4f74609c6c029b670c (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3543005a42d7e8e12b21897ef6798541bf7cbcd3",
              "status": "affected",
              "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9",
              "versionType": "git"
            },
            {
              "lessThan": "86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6",
              "status": "affected",
              "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9",
              "versionType": "git"
            },
            {
              "lessThan": "a018d1819f158991b7308e4f74609c6c029b670c",
              "status": "affected",
              "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.22",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.12",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: validate doorbell_offset in user queue creation\n\namdgpu_userq_get_doorbell_index() passes the user-provided\ndoorbell_offset to amdgpu_doorbell_index_on_bar() without bounds\nchecking. An arbitrarily large doorbell_offset can cause the\ncalculated doorbell index to fall outside the allocated doorbell BO,\npotentially corrupting kernel doorbell space.\n\nValidate that doorbell_offset falls within the doorbell BO before\ncomputing the BAR index, using u64 arithmetic to prevent overflow.\n\n(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:15:23.984Z",
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        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6"
        },
        {
          "url": "https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c"
        }
      ],
      "title": "drm/amdgpu: validate doorbell_offset in user queue creation",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31766",
    "datePublished": "2026-05-01T14:14:56.622Z",
    "dateReserved": "2026-03-09T15:48:24.140Z",
    "dateUpdated": "2026-05-11T22:15:23.984Z",
    "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.

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GHSA-GH3F-X9JP-JMHP

CVE-2026-31766 (GCVE-0-2026-31766)

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Sightings

Nomenclature