{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-47013",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47013",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-28T08:13:30.905Z",
    "updatedAt": "2026-08-05T08:45:34.504Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send",
      "summary": "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": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c7f75d11fe72913d2619f97b2334b083cd7bb955"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc1b438a35773d030be0ee80d9c635c3e558a322"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "16d8c44be52e3650917736d45f5904384a9da834"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "55fcdd1258faaecca74b91b88cc0921f9edd775d"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9dc373f74097edd0e35f3393d6248eda8d1ba99d"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8c06f34785068b87e2b560534c77c163d6c6dca7"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e407495ba6788a67d1bd41714158c079e340879b"
            },
            {
              "version": "b9b17debc69d27cd55e21ee51a5ba7fc50a426cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6d72e7c767acbbdd44ebc7d89c6690b405b32b57"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.9"
            },
            {
              "version": "4.9.269",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.233",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.191",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.119",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.37",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.11.*"
            },
            {
              "version": "5.12.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}