CVE-2023-52439 (GCVE-0-2023-52439)
Vulnerability from cvelistv5
Published
2024-02-20 18:34
Modified
2025-05-04 12:49
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.
References
Impacted products
Vendor Product Version
Linux Linux Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Version: 13af019c87f2d90e663742cb1a819834048842ae
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[{\"lang\": \"en\", \"value\": \"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(\u0026idev-\u003edev)\\nput_device(\u0026idev-\u003edev)\\nuio_device_release\\n\\t\\t\\t\\tget_device(\u0026idev-\u003edev)\\nkfree(idev)\\nuio_free_minor(minor)\\n\\t\\t\\t\\tuio_release\\n\\t\\t\\t\\tput_device(\u0026idev-\u003edev)\\n\\t\\t\\t\\tkfree(idev)\\n-------------------------------------------------------\\n\\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\\nidev when the idev-\u003edev 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 \u0026 inc idev reference with\\nminor_lock.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.306\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.268\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.209\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.148\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.74\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.13\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.1\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"4.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.100\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:49:00.841Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52439\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:49:00.841Z\", \"dateReserved\": \"2024-02-20T12:30:33.291Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-20T18:34:49.323Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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