{
  "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-2021-47297",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47297",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T14:35:19.982Z",
    "updatedAt": "2026-05-11T13:51:45.933Z",
    "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: fix uninit-value in caif_seqpkt_sendmsg",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix uninit-value in caif_seqpkt_sendmsg\n\nWhen nr_segs equal to zero in iovec_from_user, the object\nmsg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg\nwhich is defined in ___sys_sendmsg. So we cann't just judge\nmsg->msg_iter.iov->base directlly. We can use nr_segs to judge\nmsg in caif_seqpkt_sendmsg whether has data buffers.\n\n=====================================================\nBUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x1c9/0x220 lib/dump_stack.c:118\n kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118\n __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215\n caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542\n sock_sendmsg_nosec net/socket.c:652 [inline]\n sock_sendmsg net/socket.c:672 [inline]\n ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343\n ___sys_sendmsg net/socket.c:2397 [inline]\n __sys_sendmmsg+0x808/0xc90 net/socket.c:2480\n __compat_sys_sendmmsg net/compat.c:656 [inline]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ffe31dd70b70a40cd6b21b78c1713a23e021843a"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "452c3ed7bf63721b07bc2238ed1261bb26027e85"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9413c0abb57f70a953b1116318d6aa478013c35d"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1582a02fecffcee306663035a295e28e1c4aaaff"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d4c7797ab1517515f0d08b3bc1c6b48883889c54"
            },
            {
              "version": "bece7b2398d073d11b2e352405a3ecd3a1e39c60",
              "status": "affected",
              "versionType": "git",
              "lessThan": "991e634360f2622a683b48dfe44fe6d9cb765a09"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.35",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.35"
            },
            {
              "version": "4.4.277",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.277",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.241",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.199",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.136",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.54",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.13.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.13.*"
            },
            {
              "version": "5.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}