Vulnerability-Lookup

GHSA-RWH9-4WC5-HMQ7

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32

Details

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

drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges

VMAs marked with VM_IO or VM_PFNMAP are not backed by struct page objects, which GPUSVM requires in order to operate correctly. In particular, get_pages() relies on hmm_range_fault() to resolve struct pages for the target range.

Attempting to create an SVM range on such VMAs results in repeated get_pages() failures and can lead to an infinite loop inside a driver’s page‑fault handler. Prevent this by rejecting ranges on VM_IO or VM_PFNMAP VMAs and returning -EIO.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74420"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:44Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges\n\nVMAs marked with VM_IO or VM_PFNMAP are not backed by struct page\nobjects, which GPUSVM requires in order to operate correctly. In\nparticular, get_pages() relies on hmm_range_fault() to resolve struct\npages for the target range.\n\nAttempting to create an SVM range on such VMAs results in repeated\nget_pages() failures and can lead to an infinite loop inside a driver\u2019s\npage\u2011fault handler. Prevent this by rejecting ranges on VM_IO or\nVM_PFNMAP VMAs and returning -EIO.",
  "id": "GHSA-rwh9-4wc5-hmq7",
  "modified": "2026-08-15T06:32:33Z",
  "published": "2026-08-15T06:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74420"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63f443384979563f16f70420f4fa85bba31238ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74420 (GCVE-0-2026-74420)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:19

Title

drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges VMAs marked with VM_IO or VM_PFNMAP are not backed by struct page objects, which GPUSVM requires in order to operate correctly. In particular, get_pages() relies on hmm_range_fault() to resolve struct pages for the target range. Attempting to create an SVM range on such VMAs results in repeated get_pages() failures and can lead to an infinite loop inside a driver’s page‑fault handler. Prevent this by rejecting ranges on VM_IO or VM_PFNMAP VMAs and returning -EIO.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/353f26c74660bcbd8…
https://git.kernel.org/stable/c/63f443384979563f1…
https://git.kernel.org/stable/c/b82a225e57a334335…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < 353f26c74660bcbd8d82cd76622748e14a5a5db3 (git) Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < 63f443384979563f16f70420f4fa85bba31238ca (git) Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < b82a225e57a334335a21462b75ee2223bc6efe6d (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_gpusvm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            {
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              "version": "99624bdff8670795b678eafa6509aaad3a5c0175",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "99624bdff8670795b678eafa6509aaad3a5c0175",
              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_gpusvm.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "version": "6.18.40",
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            },
            {
              "lessThanOrEqual": "7.1.*",
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              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
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                  "vulnerable": true
                },
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                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges\n\nVMAs marked with VM_IO or VM_PFNMAP are not backed by struct page\nobjects, which GPUSVM requires in order to operate correctly. In\nparticular, get_pages() relies on hmm_range_fault() to resolve struct\npages for the target range.\n\nAttempting to create an SVM range on such VMAs results in repeated\nget_pages() failures and can lead to an infinite loop inside a driver\u2019s\npage\u2011fault handler. Prevent this by rejecting ranges on VM_IO or\nVM_PFNMAP VMAs and returning -EIO."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:19:04.353Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d"
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      "title": "drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges",
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    "cveId": "CVE-2026-74420",
    "datePublished": "2026-08-15T05:59:24.704Z",
    "dateReserved": "2026-08-15T05:44:03.894Z",
    "dateUpdated": "2026-08-17T05:19:04.353Z",
    "state": "PUBLISHED"
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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.

Detection rules are retrieved from Rulezet.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-RWH9-4WC5-HMQ7

CVE-2026-74420 (GCVE-0-2026-74420)

Tags

Sightings

Nomenclature