{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: vmk80xx: fix transfer-buffer overflows\n\nThe driver uses endpoint-sized USB transfer buffers but up until\nrecently had no sanity checks on the sizes.\n\nCommit e1f13c879a7c (\"staging: comedi: check validity of wMaxPacketSize\nof usb endpoints found\") inadvertently fixed NULL-pointer dereferences\nwhen accessing the transfer buffers in case a malicious device has a\nzero wMaxPacketSize.\n\nMake sure to allocate buffers large enough to handle also the other\naccesses that are done without a size check (e.g. byte 18 in\nvmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond\nthe buffers, for example, when doing descriptor fuzzing.\n\nThe original driver was for a low-speed device with 8-byte buffers.\nSupport was later added for a device that uses bulk transfers and is\npresumably a full-speed device with a maximum 64-byte wMaxPacketSize."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/comedi/drivers/vmk80xx.c"
               ],
               "versions": [
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "5229159f1d05",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "ec85bcff4ed0",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "40d2a7e278e2",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "7a2021b896de",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "199acd8c110e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "33d7a470730d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "278484ae9329",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "06ac746d57e6",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "985cafccbf9b",
                     "lessThan": "a23461c47482",
                     "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/comedi/drivers/vmk80xx.c"
               ],
               "versions": [
                  {
                     "version": "2.6.31",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.31",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.292",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.290",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.255",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.217",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.159",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.79",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14.18",
                     "lessThanOrEqual": "5.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.2",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.16",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/5229159f1d052821007aff1a1beb7873eacf1a9f"
            },
            {
               "url": "https://git.kernel.org/stable/c/ec85bcff4ed09260243d8f39faba99e1041718ba"
            },
            {
               "url": "https://git.kernel.org/stable/c/40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7"
            },
            {
               "url": "https://git.kernel.org/stable/c/7a2021b896de1ad559d33b5c5cdd20b982242088"
            },
            {
               "url": "https://git.kernel.org/stable/c/199acd8c110e3ae62833c24f632b0bb1c9f012a9"
            },
            {
               "url": "https://git.kernel.org/stable/c/33d7a470730dfe7c9bfc8da84575cf2cedd60d00"
            },
            {
               "url": "https://git.kernel.org/stable/c/278484ae93297b1bb1ce755f9d3b6d95a48c7d47"
            },
            {
               "url": "https://git.kernel.org/stable/c/06ac746d57e6d32b062e220415c607b7e2e0fa50"
            },
            {
               "url": "https://git.kernel.org/stable/c/a23461c47482fc232ffc9b819539d1f837adf2b1"
            }
         ],
         "title": "comedi: vmk80xx: fix transfer-buffer overflows",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47475",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}