{
   "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: pch_can: pch_can_rx_normal: fix use after free\n\nAfter calling netif_receive_skb(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is dereferenced\njust after the call netif_receive_skb(skb).\n\nReordering the lines solves the issue."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/can/pch_can.c"
               ],
               "versions": [
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "bafe343a885c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "3a3c46e2eff0",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "affbad02bf80",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "3e193ef4e0a3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "abb4eff3dcd2",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "703dde112021",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "6c73fc931658",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b21d18b51b31",
                     "lessThan": "94cddf1e9227",
                     "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/pch_can.c"
               ],
               "versions": [
                  {
                     "version": "2.6.37",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.37",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.295",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.293",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.258",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.221",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.165",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.85",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.8",
                     "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/bafe343a885c70dddf358379cf0b2a1c07355d8d"
            },
            {
               "url": "https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76"
            },
            {
               "url": "https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3"
            },
            {
               "url": "https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa"
            },
            {
               "url": "https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4"
            },
            {
               "url": "https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e"
            },
            {
               "url": "https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7"
            },
            {
               "url": "https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db"
            }
         ],
         "title": "can: pch_can: pch_can_rx_normal: fix use after free",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47520",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}