{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send\n\nIn emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).\nIf some error happens in emac_tx_fill_tpd(), the skb will be freed via\ndev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().\nBut the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).\n\nAs i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,\nthus my patch assigns skb->len to 'len' before the possible free and\nuse 'len' instead of skb->len later."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/net/ethernet/qualcomm/emac/emac-mac.c"
               ],
               "versions": [
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "c7f75d11fe72",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "dc1b438a3577",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "16d8c44be52e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "55fcdd1258fa",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "9dc373f74097",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "8c06f3478506",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "e407495ba678",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "b9b17debc69d",
                     "lessThan": "6d72e7c767ac",
                     "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/ethernet/qualcomm/emac/emac-mac.c"
               ],
               "versions": [
                  {
                     "version": "4.9",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.9",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.269",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.233",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.191",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.119",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.37",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.11.21",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.4",
                     "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/c7f75d11fe72913d2619f97b2334b083cd7bb955"
            },
            {
               "url": "https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322"
            },
            {
               "url": "https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834"
            },
            {
               "url": "https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d"
            },
            {
               "url": "https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d"
            },
            {
               "url": "https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7"
            },
            {
               "url": "https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b"
            },
            {
               "url": "https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57"
            }
         ],
         "title": "net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47013",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}