{
  "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-2021-47068",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47068",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-29T22:37:41.736Z",
    "updatedAt": "2026-08-05T08:45:49.592Z",
    "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/nfc: fix use-after-free llcp_sock_bind/connect",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/nfc: fix use-after-free llcp_sock_bind/connect\n\nCommits 8a4cd82d (\"nfc: fix refcount leak in llcp_sock_connect()\")\nand c33b1cc62 (\"nfc: fix refcount leak in llcp_sock_bind()\")\nfixed a refcount leak bug in bind/connect but introduced a\nuse-after-free if the same local is assigned to 2 different sockets.\n\nThis can be triggered by the following simple program:\n    int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n    int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n    memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) );\n    addr.sa_family = AF_NFC;\n    addr.nfc_protocol = NFC_PROTO_NFC_DEP;\n    bind( sock1, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )\n    bind( sock2, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )\n    close(sock1);\n    close(sock2);\n\nFix this by assigning NULL to llcp_sock->local after calling\nnfc_llcp_local_put.\n\nThis addresses CVE-2021-23134.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a1cdd18c49d23ec38097ac2c5b0d761146fc0109",
              "status": "affected",
              "versionType": "git",
              "lessThan": "26157c82ba756767b2bd66d28a71b1bc454447f6"
            },
            {
              "version": "18013007b596771bf5f5e7feee9586fb0386ad14",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ccddad6dd28530e716448e594c9ca7c76ccd0570"
            },
            {
              "version": "538a6ff11516d38a61e237d2d2dc04c30c845fbe",
              "status": "affected",
              "versionType": "git",
              "lessThan": "18ae4a192a4496e48a5490b52812645d2413307c"
            },
            {
              "version": "adbb1d218c5f56dbae052765da83c0f57fce2a31",
              "status": "affected",
              "versionType": "git",
              "lessThan": "48fba458fe54cc2a980a05c13e6c19b8b2cfb610"
            },
            {
              "version": "c89903c9eff219a4695e63715cf922748d743f65",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e32352070bcac22be6ed8ab635debc280bb65b8c"
            },
            {
              "version": "6fb003e5ae18d8cda4c8a1175d9dd8db12bec049",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6b7021ed36dabf29e56842e3408781cd3b82ef6e"
            },
            {
              "version": "8c9e4971e142e2899606a2490b77a1208c1f4638",
              "status": "affected",
              "versionType": "git",
              "lessThan": "374cdde4dcc9c909a60713abdbbf96d5e3e09f91"
            },
            {
              "version": "c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "18175fe17ae043a0b81e5d511f8817825784c299"
            },
            {
              "version": "c33b1cc62ac05c1dbb1cdafe2eb66da01c76ca8d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c61760e6940dd4039a7f5e84a6afc9cdbf4d82b6"
            },
            {
              "version": "4.4.267",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.4.269"
            },
            {
              "version": "4.9.267",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.9.269"
            },
            {
              "version": "4.14.231",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.233"
            },
            {
              "version": "4.19.187",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.191"
            },
            {
              "version": "5.4.112",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.119"
            },
            {
              "version": "5.10.30",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.37"
            },
            {
              "version": "5.11.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.11.21"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "4.4.269",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}