{
  "cveId": "CVE-2021-47124",
  "url": "https://patchblox.com/security/cve/CVE-2021-47124",
  "summary": "CVE-2021-47124 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47124, released March 15, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix link timeout refs  WARNING: CPU: 0...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix link timeout refs  WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate\u002B0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate\u002B0x15b/0x1a0 lib/refcount.c:28 Call Trace:  __refcount_sub_and_test include/linux/refcount.h:283 [inline]  __refcount_dec_and_test include/linux/refcount.h:315 [inline]  refcount_dec_and_test include/linux/refcount.h:333 [inline]  io_put_req fs/io_uring.c:2140 [inline]  io_queue_linked_timeout fs/io_uring.c:6300 [inline]  __io_queue_sqe\u002B0xbef/0xec0 fs/io_uring.c:6354  io_submit_sqe fs/io_uring.c:6534 [inline]  io_submit_sqes\u002B0x2bbd/0x7c50 fs/io_uring.c:6660  __do_sys_io_uring_enter fs/io_uring.c:9240 [inline]  __se_sys_io_uring_enter\u002B0x256/0x1d60 fs/io_uring.c:9182  io_link_timeout_fn() should put only one reference of the linked timeout request, however in case of racing with the master request\u0027s completion first io_req_complete() puts one and then io_put_req_deferred() is called.",
  "published": "2024-03-15T21:15:07Z",
  "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": 0.00243,
  "epssPercentile": 0.15618,
  "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-2021-47124",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47124",
      "released": "2024-03-15T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47124",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47124",
      "released": "2024-03-15T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47124",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47124",
      "released": "2024-03-15T21:15:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}