fbdev: Fix invalid page access after closing deferred I/O devices

{
  "id": "ada1c76d67707a192e6a68116b46c264c904102686cb084541f3ec78a7b3abfb",
  "url": "https://osv.dev/vulnerability/CVE-2023-52731",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fbdev: Fix invalid page access after closing deferred I/O devices",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix invalid page access after closing deferred I/O devices When a fbdev with deferred I/O is once opened and closed, the dirty pages still remain queued in the pageref list, and eventually later those may be processed in the delayed work. This may lead to a corruption of pages, hitting an Oops. This patch makes sure to cancel the delayed work and clean up the pageref list at closing the device for addressing the bug. A part of the cleanup code is factored out as a new helper function that is called from the common fb_release().",
    "evidence": "osv:CVE-2023-52731",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.13",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-52731",
      "aliases": [
        "CVE-2023-52731"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                  "fixed": "3efc61d95259956db25347e2a9562c3e54546e20"
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              ]
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52731.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.1.13"
                }
              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52731.json"
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      ],
      "modified": "2026-10-28T02:30:42.007965527Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20",
        "https://git.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9",
        "https://git.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52731.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52731",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52731.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-52731",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509325,
  "published_at": "2024-05-21T15:22:57.282+00:00"
}