cve-2021-47013
Vulnerability from cvelistv5
Published
2024-02-28 08:13
Modified
2024-11-04 11:57
Severity ?
Summary
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47013",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-02-28T19:56:27.719807Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:13:43.156Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.713Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/emac/emac-mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c7f75d11fe72",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "dc1b438a3577",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "16d8c44be52e",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "55fcdd1258fa",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "9dc373f74097",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "8c06f3478506",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "e407495ba678",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            },
            {
              "lessThan": "6d72e7c767ac",
              "status": "affected",
              "version": "b9b17debc69d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/emac/emac-mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.269",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.233",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.119",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "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-\u003elen by netdev_sent_queue(,skb-\u003elen).\n\nAs i observed that emac_tx_fill_tpd() haven\u0027t modified the value of skb-\u003elen,\nthus my patch assigns skb-\u003elen to \u0027len\u0027 before the possible free and\nuse \u0027len\u0027 instead of skb-\u003elen later."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-04T11:57:43.263Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47013",
    "datePublished": "2024-02-28T08:13:30.905Z",
    "dateReserved": "2024-02-27T18:42:55.953Z",
    "dateUpdated": "2024-11-04T11:57:43.263Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47013\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-28T09:15:38.800\",\"lastModified\":\"2024-02-28T14:06:45.783\",\"vulnStatus\":\"Awaiting Analysis\",\"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-\u003elen by netdev_sent_queue(,skb-\u003elen).\\n\\nAs i observed that emac_tx_fill_tpd() haven\u0027t modified the value of skb-\u003elen,\\nthus my patch assigns skb-\u003elen to \u0027len\u0027 before the possible free and\\nuse \u0027len\u0027 instead of skb-\u003elen later.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net:emac/emac-mac: Se corrige un uso after free en emac_mac_tx_buf_send En emac_mac_tx_buf_send, llama a emac_tx_fill_tpd(..,skb,..). Si ocurre alg\u00fan error en emac_tx_fill_tpd(), el skb se liberar\u00e1 mediante dev_kfree_skb(skb) en la rama de error de emac_tx_fill_tpd(). Pero el skb liberado todav\u00eda se usa a trav\u00e9s de skb-\u0026gt;len por netdev_sent_queue(,skb-\u0026gt;len). Como observ\u00e9 que emac_tx_fill_tpd() no ha modificado el valor de skb-\u0026gt;len, por lo tanto mi parche asigna skb-\u0026gt;len a \u0027len\u0027 antes del posible free y usa \u0027len\u0027 en lugar de skb-\u0026gt;len m\u00e1s tarde.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.