github - ghsa-gvpw-xr49-hcwq

GHSA-GVPW-XR49-HCWQ

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 18:31

Details

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

drm/xe/vf: Perform early GT MMIO initialization to read GMDID

VFs need to communicate with the GuC to obtain the GMDID value and existing GuC functions used for that assume that the GT has it's MMIO members already setup. However, due to recent refactoring the gt->mmio is initialized later, and any attempt by the VF to use xe_mmio_read|write() from GuC functions will lead to NPD crash due to unset MMIO register address:

[] xe 0000:00:02.1: [drm] Running in SR-IOV VF mode [] xe 0000:00:02.1: [drm] GT0: sending H2G MMIO 0x5507 [] BUG: unable to handle page fault for address: 0000000000190240

Since we are already tweaking the id and type of the primary GT to mimic it's a Media GT before initializing the GuC communication, we can also call xe_gt_mmio_init() to perform early setup of the gt->mmio which will make those GuC functions work again.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38036"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T10:15:35Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vf: Perform early GT MMIO initialization to read GMDID\n\nVFs need to communicate with the GuC to obtain the GMDID value\nand existing GuC functions used for that assume that the GT has\nit\u0027s MMIO members already setup. However, due to recent refactoring\nthe gt-\u003emmio is initialized later, and any attempt by the VF to use\nxe_mmio_read|write() from GuC functions will lead to NPD crash due\nto unset MMIO register address:\n\n[] xe 0000:00:02.1: [drm] Running in SR-IOV VF mode\n[] xe 0000:00:02.1: [drm] GT0: sending H2G MMIO 0x5507\n[] BUG: unable to handle page fault for address: 0000000000190240\n\nSince we are already tweaking the id and type of the primary GT to\nmimic it\u0027s a Media GT before initializing the GuC communication,\nwe can also call xe_gt_mmio_init() to perform early setup of the\ngt-\u003emmio which will make those GuC functions work again.",
  "id": "GHSA-gvpw-xr49-hcwq",
  "modified": "2025-11-14T18:31:21Z",
  "published": "2025-06-18T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13265fe7426ec9ba5aa86baab913417ca361e8a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef6e950aea76a5009ccc79ebfa955ecc66cd85a2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38036 (GCVE-0-2025-38036)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2025-06-19 13:10

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vf: Perform early GT MMIO initialization to read GMDID VFs need to communicate with the GuC to obtain the GMDID value and existing GuC functions used for that assume that the GT has it's MMIO members already setup. However, due to recent refactoring the gt->mmio is initialized later, and any attempt by the VF to use xe_mmio_read|write() from GuC functions will lead to NPD crash due to unset MMIO register address: [] xe 0000:00:02.1: [drm] Running in SR-IOV VF mode [] xe 0000:00:02.1: [drm] GT0: sending H2G MMIO 0x5507 [] BUG: unable to handle page fault for address: 0000000000190240 Since we are already tweaking the id and type of the primary GT to mimic it's a Media GT before initializing the GuC communication, we can also call xe_gt_mmio_init() to perform early setup of the gt->mmio which will make those GuC functions work again.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ef6e950aea76a5009…
	https://git.kernel.org/stable/c/13265fe7426ec9ba5…

Impacted products

Vendor

Product

Version

Linux

Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < ef6e950aea76a5009ccc79ebfa955ecc66cd85a2 (git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 13265fe7426ec9ba5aa86baab913417ca361e8a4 (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.14.9 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ef6e950aea76a5009ccc79ebfa955ecc66cd85a2",
              "status": "affected",
              "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
              "versionType": "git"
            },
            {
              "lessThan": "13265fe7426ec9ba5aa86baab913417ca361e8a4",
              "status": "affected",
              "version": "dd08ebf6c3525a7ea2186e636df064ea47281987",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.9",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vf: Perform early GT MMIO initialization to read GMDID\n\nVFs need to communicate with the GuC to obtain the GMDID value\nand existing GuC functions used for that assume that the GT has\nit\u0027s MMIO members already setup. However, due to recent refactoring\nthe gt-\u003emmio is initialized later, and any attempt by the VF to use\nxe_mmio_read|write() from GuC functions will lead to NPD crash due\nto unset MMIO register address:\n\n[] xe 0000:00:02.1: [drm] Running in SR-IOV VF mode\n[] xe 0000:00:02.1: [drm] GT0: sending H2G MMIO 0x5507\n[] BUG: unable to handle page fault for address: 0000000000190240\n\nSince we are already tweaking the id and type of the primary GT to\nmimic it\u0027s a Media GT before initializing the GuC communication,\nwe can also call xe_gt_mmio_init() to perform early setup of the\ngt-\u003emmio which will make those GuC functions work again."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-19T13:10:58.362Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/ef6e950aea76a5009ccc79ebfa955ecc66cd85a2"
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        {
          "url": "https://git.kernel.org/stable/c/13265fe7426ec9ba5aa86baab913417ca361e8a4"
        }
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      "title": "drm/xe/vf: Perform early GT MMIO initialization to read GMDID",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38036",
    "datePublished": "2025-06-18T09:33:22.928Z",
    "dateReserved": "2025-04-16T04:51:23.978Z",
    "dateUpdated": "2025-06-19T13:10:58.362Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

GHSA-GVPW-XR49-HCWQ

CVE-2025-38036 (GCVE-0-2025-38036)

Tags

Sightings

Nomenclature