{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "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(&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": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/uio/uio.c"
               ],
               "versions": [
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "3174e0f7de1b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "e93da893d52d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "5e0be1229ae1",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "5cf604ee538e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "17a8519cb359",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "35f102607054",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "913205930da6",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "57c5f4df0a5a",
                     "lessThan": "0c9ae0b86050",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/uio/uio.c"
               ],
               "versions": [
                  {
                     "version": "4.18",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.18",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.306",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.268",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.209",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.148",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.74",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.13",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.1",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c"
            },
            {
               "url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50"
            },
            {
               "url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570"
            },
            {
               "url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7"
            },
            {
               "url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea"
            },
            {
               "url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad"
            },
            {
               "url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41"
            },
            {
               "url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2"
            }
         ],
         "title": "uio: Fix use-after-free in uio_open",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52439",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}