{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcba_usb: fix memory leak in mcba_usb\n\nSyzbot reported memory leak in SocketCAN driver for Microchip CAN BUS\nAnalyzer Tool. The problem was in unfreed usb_coherent.\n\nIn mcba_usb_start() 20 coherent buffers are allocated and there is\nnothing, that frees them:\n\n1) In callback function the urb is resubmitted and that's all\n2) In disconnect function urbs are simply killed, but URB_FREE_BUFFER\n   is not set (see mcba_usb_start) and this flag cannot be used with\n   coherent buffers.\n\nFail log:\n| [ 1354.053291][ T8413] mcba_usb 1-1:0.0 can0: device disconnected\n| [ 1367.059384][ T8420] kmemleak: 20 new suspected memory leaks (see /sys/kernel/debug/kmem)\n\nSo, all allocated buffers should be freed with usb_free_coherent()\nexplicitly\n\nNOTE:\nThe same pattern for allocating and freeing coherent buffers\nis used in drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/can/usb/mcba_usb.c"
               ],
               "versions": [
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "89df95ce32be",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "a115198caaab",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "6f87c0e21ad2",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "6bd3d80d1f01",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "d0760a4ef856",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "51f3baad7de9",
                     "lessThan": "91c02557174b",
                     "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/net/can/usb/mcba_usb.c"
               ],
               "versions": [
                  {
                     "version": "4.12",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.12",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.238",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.196",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.128",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.46",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.13",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/89df95ce32be204eef2e7d4b2f6fb552fb191a68"
            },
            {
               "url": "https://git.kernel.org/stable/c/a115198caaab6d663bef75823a3c5f0802306d60"
            },
            {
               "url": "https://git.kernel.org/stable/c/6f87c0e21ad20dd3d22108e33db1c552dfa352a0"
            },
            {
               "url": "https://git.kernel.org/stable/c/6bd3d80d1f019cefa7011056c54b323f1d8b8e83"
            },
            {
               "url": "https://git.kernel.org/stable/c/d0760a4ef85697bc756d06eae17ae27f3f055401"
            },
            {
               "url": "https://git.kernel.org/stable/c/91c02557174be7f72e46ed7311e3bea1939840b0"
            }
         ],
         "title": "can: mcba_usb: fix memory leak in mcba_usb",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47231",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}