{
  "cveId": "CVE-2023-52903",
  "url": "https://patchblox.com/security/cve/CVE-2023-52903",
  "summary": "CVE-2023-52903 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52903, released August 21, 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: lock overflowing for IOPOLL  syzbot re...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring: lock overflowing for IOPOLL  syzbot reports an issue with overflow filling for IOPOLL:  WARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow\u002B0x1c0/0x230 io_uring/io_uring.c:734 CPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0 Workqueue: events_unbound io_ring_exit_work Call trace: \u00A0io_cqring_event_overflow\u002B0x1c0/0x230 io_uring/io_uring.c:734 \u00A0io_req_cqe_overflow\u002B0x5c/0x70 io_uring/io_uring.c:773 \u00A0io_fill_cqe_req io_uring/io_uring.h:168 [inline] \u00A0io_do_iopoll\u002B0x474/0x62c io_uring/rw.c:1065 \u00A0io_iopoll_try_reap_events\u002B0x6c/0x108 io_uring/io_uring.c:1513 \u00A0io_uring_try_cancel_requests\u002B0x13c/0x258 io_uring/io_uring.c:3056 \u00A0io_ring_exit_work\u002B0xec/0x390 io_uring/io_uring.c:2869 \u00A0process_one_work\u002B0x2d8/0x504 kernel/workqueue.c:2289 \u00A0worker_thread\u002B0x340/0x610 kernel/workqueue.c:2436 \u00A0kthread\u002B0x12c/0x158 kernel/kthread.c:376 \u00A0ret_from_fork\u002B0x10/0x20 arch/arm64/kernel/entry.S:863  There is no real problem for normal IOPOLL as flush is also called with uring_lock taken, but it\u0027s getting more complicated for IOPOLL|SQPOLL, for which __io_cqring_overflow_flush() happens from the CQ waiting path.",
  "published": "2024-08-21T07:15:06Z",
  "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": 0.00186,
  "epssPercentile": 0.08222,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2023-52903",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52903",
      "released": "2024-08-21T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2023-52903",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52903",
      "released": "2024-08-21T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2023-52903",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52903",
      "released": "2024-08-21T07:15:06Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}