CVE-2021-47669 (GCVE-0-2021-47669)
Vulnerability from cvelistv5
Published
2025-04-17 18:01
Modified
2025-05-04 07:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
References
Impacted products
Vendor Product Version
Linux Linux Version: a8f820a380a2a06fc4fe1a54159067958f800929
Version: a8f820a380a2a06fc4fe1a54159067958f800929
Version: a8f820a380a2a06fc4fe1a54159067958f800929
Version: a8f820a380a2a06fc4fe1a54159067958f800929
Version: a8f820a380a2a06fc4fe1a54159067958f800929
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-47669",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-17T18:17:52.149604Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-17T18:25:25.277Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/vxcan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105",
              "status": "affected",
              "version": "a8f820a380a2a06fc4fe1a54159067958f800929",
              "versionType": "git"
            },
            {
              "lessThan": "9b820875a32a3443d67bfd368e93038354e98052",
              "status": "affected",
              "version": "a8f820a380a2a06fc4fe1a54159067958f800929",
              "versionType": "git"
            },
            {
              "lessThan": "a24476b37167816e6352ca1a2cf3769847774f70",
              "status": "affected",
              "version": "a8f820a380a2a06fc4fe1a54159067958f800929",
              "versionType": "git"
            },
            {
              "lessThan": "e771a874076115df8bff27d325edfd2340e4ec69",
              "status": "affected",
              "version": "a8f820a380a2a06fc4fe1a54159067958f800929",
              "versionType": "git"
            },
            {
              "lessThan": "75854cad5d80976f6ea0f0431f8cedd3bcc475cb",
              "status": "affected",
              "version": "a8f820a380a2a06fc4fe1a54159067958f800929",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/vxcan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.171",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.218",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.171",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.93",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.11",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.11",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: vxcan: vxcan_xmit: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\nafter the netif_rx_ni()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:15:49.993Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052"
        },
        {
          "url": "https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70"
        },
        {
          "url": "https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69"
        },
        {
          "url": "https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb"
        }
      ],
      "title": "can: vxcan: vxcan_xmit: fix use after free bug",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47669",
    "datePublished": "2025-04-17T18:01:29.979Z",
    "dateReserved": "2025-04-16T07:16:05.752Z",
    "dateUpdated": "2025-05-04T07:15:49.993Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47669\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-17T18:15:43.730\",\"lastModified\":\"2025-04-21T18:41:22.637\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: vxcan: vxcan_xmit: fix use after free bug\\n\\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\\nafter the netif_rx_ni().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: vxcan: vxcan_xmit: correcci\u00f3n del error \\\"use after free\\\". Tras llamar a netif_rx_ni(skb), desreferenciar skb no es seguro. En particular, se accede al cfd canfd_frame, que crea un alias de memoria skb, despu\u00e9s de netif_rx_ni().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.12\",\"versionEndExcluding\":\"4.14.218\",\"matchCriteriaId\":\"D55AC4D7-E3A8-42B4-AD78-C7E85336E00A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.171\",\"matchCriteriaId\":\"E048F4A6-F5E6-41BF-BCD6-49274CA46915\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.93\",\"matchCriteriaId\":\"3F19E9ED-75CE-4576-98F5-2746C9189696\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.11\",\"matchCriteriaId\":\"B62A8CB5-77B4-40A9-8B60-AF691EC1FB99\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"18B1C9CE-F7E4-426B-A770-79F86AB5CC38\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"7A70E596-2EF7-4651-B2EF-2CEE31DB6893\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"18C82C96-2853-4DFE-93AD-F6E59B4129CA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"A330B043-47EA-4D06-82BF-153A1735FC11\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47669\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-04-17T18:17:52.149604Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-04-17T18:17:53.914Z\"}}], \"cna\": {\"title\": \"can: vxcan: vxcan_xmit: fix use after free bug\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a8f820a380a2a06fc4fe1a54159067958f800929\", \"lessThan\": \"6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8f820a380a2a06fc4fe1a54159067958f800929\", \"lessThan\": \"9b820875a32a3443d67bfd368e93038354e98052\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8f820a380a2a06fc4fe1a54159067958f800929\", \"lessThan\": \"a24476b37167816e6352ca1a2cf3769847774f70\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8f820a380a2a06fc4fe1a54159067958f800929\", \"lessThan\": \"e771a874076115df8bff27d325edfd2340e4ec69\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8f820a380a2a06fc4fe1a54159067958f800929\", \"lessThan\": \"75854cad5d80976f6ea0f0431f8cedd3bcc475cb\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/can/vxcan.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.218\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.171\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.93\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/can/vxcan.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105\"}, {\"url\": \"https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052\"}, {\"url\": \"https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70\"}, {\"url\": \"https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69\"}, {\"url\": \"https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb\"}], \"x_generator\": {\"engine\": \"bippy-1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: vxcan: vxcan_xmit: fix use after free bug\\n\\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\\nafter the netif_rx_ni().\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-04-17T18:01:29.979Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47669\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-17T18:25:25.277Z\", \"dateReserved\": \"2025-04-16T07:16:05.752Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-17T18:01:29.979Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • 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.