CVE-2021-47671 (GCVE-0-2021-47671)
Vulnerability from cvelistv5
Published
2025-04-17 18:01
Modified
2025-05-04 07:15
Severity ?
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path In es58x_rx_err_msg(), if can->do_set_mode() fails, the function directly returns without calling netif_rx(skb). This means that the skb previously allocated by alloc_can_err_skb() is not freed. In other terms, this is a memory leak. This patch simply removes the return statement in the error branch and let the function continue. Issue was found with GCC -fanalyzer, please follow the link below for details.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8537257874e949a59c834cecfd5a063e11b64b0b
Version: 8537257874e949a59c834cecfd5a063e11b64b0b
Version: 8537257874e949a59c834cecfd5a063e11b64b0b
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "LOW",
              "baseScore": 3.3,
              "baseSeverity": "LOW",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-47671",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-17T19:49:27.476298Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-401",
                "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-17T19:49:36.575Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/etas_es58x/es58x_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4f389e1276a5389c92cef860c9fde8e1c802a871",
              "status": "affected",
              "version": "8537257874e949a59c834cecfd5a063e11b64b0b",
              "versionType": "git"
            },
            {
              "lessThan": "7eb0881aec26099089f12ae850aebd93190b1dfe",
              "status": "affected",
              "version": "8537257874e949a59c834cecfd5a063e11b64b0b",
              "versionType": "git"
            },
            {
              "lessThan": "d9447f768bc8c60623e4bb3ce65b8f4654d33a50",
              "status": "affected",
              "version": "8537257874e949a59c834cecfd5a063e11b64b0b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/etas_es58x/es58x_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.14.*",
              "status": "unaffected",
              "version": "5.14.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14.19",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.3",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path\n\nIn es58x_rx_err_msg(), if can-\u003edo_set_mode() fails, the function\ndirectly returns without calling netif_rx(skb). This means that the\nskb previously allocated by alloc_can_err_skb() is not freed. In other\nterms, this is a memory leak.\n\nThis patch simply removes the return statement in the error branch and\nlet the function continue.\n\nIssue was found with GCC -fanalyzer, please follow the link below for\ndetails."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:15:52.076Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4f389e1276a5389c92cef860c9fde8e1c802a871"
        },
        {
          "url": "https://git.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50"
        }
      ],
      "title": "can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47671",
    "datePublished": "2025-04-17T18:01:31.459Z",
    "dateReserved": "2025-04-16T07:16:05.753Z",
    "dateUpdated": "2025-05-04T07:15:52.076Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47671\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-17T18:15:43.933\",\"lastModified\":\"2025-04-21T18:40:48.773\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path\\n\\nIn es58x_rx_err_msg(), if can-\u003edo_set_mode() fails, the function\\ndirectly returns without calling netif_rx(skb). This means that the\\nskb previously allocated by alloc_can_err_skb() is not freed. In other\\nterms, this is a memory leak.\\n\\nThis patch simply removes the return statement in the error branch and\\nlet the function continue.\\n\\nIssue was found with GCC -fanalyzer, please follow the link below for\\ndetails.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: etas_es58x: es58x_rx_err_msg(): corrige p\u00e9rdida de memoria en la ruta de error. En es58x_rx_err_msg(), si can-\u0026gt;do_set_mode() falla, la funci\u00f3n retorna directamente sin llamar a netif_rx(skb). Esto significa que el skb previamente asignado por alloc_can_err_skb() no se libera. En otras palabras, se trata de una p\u00e9rdida de memoria. Este parche simplemente elimina la instrucci\u00f3n de retorno en la rama de error y permite que la funci\u00f3n contin\u00fae. Se encontr\u00f3 un problema con GCC -fanalyzer; siga el enlace a continuaci\u00f3n para obtener m\u00e1s informaci\u00f3n.\"}],\"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:N/I:N/A:L\",\"baseScore\":3.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13\",\"versionEndExcluding\":\"5.14.19\",\"matchCriteriaId\":\"D23D4C9E-D61A-4C7A-8EB4-2351743A8350\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15\",\"versionEndExcluding\":\"5.15.3\",\"matchCriteriaId\":\"83F73FEF-14B1-40D4-9A9D-2FCF409F26AE\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4f389e1276a5389c92cef860c9fde8e1c802a871\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 3.3, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47671\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-04-17T19:49:27.476298Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-401\", \"description\": \"CWE-401 Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-04-17T19:49:24.576Z\"}}], \"cna\": {\"title\": \"can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8537257874e949a59c834cecfd5a063e11b64b0b\", \"lessThan\": \"4f389e1276a5389c92cef860c9fde8e1c802a871\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8537257874e949a59c834cecfd5a063e11b64b0b\", \"lessThan\": \"7eb0881aec26099089f12ae850aebd93190b1dfe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8537257874e949a59c834cecfd5a063e11b64b0b\", \"lessThan\": \"d9447f768bc8c60623e4bb3ce65b8f4654d33a50\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/can/usb/etas_es58x/es58x_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.14.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/can/usb/etas_es58x/es58x_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4f389e1276a5389c92cef860c9fde8e1c802a871\"}, {\"url\": \"https://git.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfe\"}, {\"url\": \"https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path\\n\\nIn es58x_rx_err_msg(), if can-\u003edo_set_mode() fails, the function\\ndirectly returns without calling netif_rx(skb). This means that the\\nskb previously allocated by alloc_can_err_skb() is not freed. In other\\nterms, this is a memory leak.\\n\\nThis patch simply removes the return statement in the error branch and\\nlet the function continue.\\n\\nIssue was found with GCC -fanalyzer, please follow the link below for\\ndetails.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.19\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.3\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"5.13\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:15:52.076Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47671\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:15:52.076Z\", \"dateReserved\": \"2025-04-16T07:16:05.753Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-17T18:01:31.459Z\", \"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.