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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:19
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < 353f26c74660bcbd8d82cd76622748e14a5a5db3 (git)
Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < 63f443384979563f16f70420f4fa85bba31238ca (git)
Affected: 99624bdff8670795b678eafa6509aaad3a5c0175 , < b82a225e57a334335a21462b75ee2223bc6efe6d (git)
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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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{
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      "descriptions": [
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          "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",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b82a225e57a334335a21462b75ee2223bc6efe6d"
        }
      ],
      "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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      "percentile": "0.0506"
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        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-74420",
        "lastModified": "2026-08-17T06:19:37.467",
        "metrics": {},
        "published": "2026-08-15T06:22:44.100",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/353f26c74660bcbd8d82cd76622748e14a5a5db3"
          },
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      "current_release_date": "2026-08-19T10:00:51+00:00",
      "cve": "CVE-2026-74420",
      "id": "CVE-2026-74420",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/gpusvm: Reject VMAs with VM_IO or VM_PFNMAP when creating SVM ranges",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74420.json",
      "version": "3"
    }
  }
}



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