{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-52439",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52439",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-20T18:34:49.323Z",
    "updatedAt": "2026-08-05T09:09:56.653Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "uio: Fix use-after-free in uio_open",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix use-after-free in uio_open\n\ncore-1\t\t\t\tcore-2\n-------------------------------------------------------\nuio_unregister_device\t\tuio_open\n\t\t\t\tidev = idr_find()\ndevice_unregister(&idev->dev)\nput_device(&idev->dev)\nuio_device_release\n\t\t\t\tget_device(&idev->dev)\nkfree(idev)\nuio_free_minor(minor)\n\t\t\t\tuio_release\n\t\t\t\tput_device(&idev->dev)\n\t\t\t\tkfree(idev)\n-------------------------------------------------------\n\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev->dev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\n   freed.\n\nTo address this issue, we can get idev atomic & inc idev reference with\nminor_lock.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3174e0f7de1ba392dc191625da83df02d695b60c"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e93da893d52d82d57fc0db2ca566024e0f26ff50"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5e0be1229ae199ebb90b33102f74a0f22d152570"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5cf604ee538ed0c467abe3b4cda5308a6398f0f7"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17a8519cb359c3b483fb5c7367efa9a8a508bdea"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35f102607054faafe78d2a6994b18d5d9d6e92ad"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "913205930da6213305616ac539447702eaa85e41"
            },
            {
              "version": "57c5f4df0a5a0ee83df799991251e2ee93a5e4e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0c9ae0b8605078eafc3bea053cc78791e97ba2e2"
            },
            {
              "version": "13af019c87f2d90e663742cb1a819834048842ae",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.14.100",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.18"
            },
            {
              "version": "4.19.306",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.268",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.148",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.74",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.7.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.7.*"
            },
            {
              "version": "6.8",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}