{
  "cveId": "CVE-2021-47297",
  "url": "https://patchblox.com/security/cve/CVE-2021-47297",
  "summary": "CVE-2021-47297 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47297, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: fix uninit-value in caif_seqpkt_sendmsg  Wh...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: fix uninit-value in caif_seqpkt_sendmsg  When nr_segs equal to zero in iovec_from_user, the object msg-\u003Emsg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg which is defined in ___sys_sendmsg. So we cann\u0027t just judge msg-\u003Emsg_iter.iov-\u003Ebase directlly. We can use nr_segs to judge msg in caif_seqpkt_sendmsg whether has data buffers.  ===================================================== BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg\u002B0x693/0xf60 net/caif/caif_socket.c:542 Call Trace:  __dump_stack lib/dump_stack.c:77 [inline]  dump_stack\u002B0x1c9/0x220 lib/dump_stack.c:118  kmsan_report\u002B0xf7/0x1e0 mm/kmsan/kmsan_report.c:118  __msan_warning\u002B0x58/0xa0 mm/kmsan/kmsan_instr.c:215  caif_seqpkt_sendmsg\u002B0x693/0xf60 net/caif/caif_socket.c:542  sock_sendmsg_nosec net/socket.c:652 [inline]  sock_sendmsg net/socket.c:672 [inline]  ____sys_sendmsg\u002B0x12b6/0x1350 net/socket.c:2343  ___sys_sendmsg net/socket.c:2397 [inline]  __sys_sendmmsg\u002B0x808/0xc90 net/socket.c:2480  __compat_sys_sendmmsg net/compat.c:656 [inline]",
  "published": "2024-05-21T15:15:17Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00226,
  "epssPercentile": 0.13385,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47297",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47297",
      "released": "2024-05-21T15:15:17Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47297",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47297",
      "released": "2024-05-21T15:15:17Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47297",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47297",
      "released": "2024-05-21T15:15:17Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}