{
  "cveId": "CVE-2021-47392",
  "url": "https://patchblox.com/security/cve/CVE-2021-47392",
  "summary": "CVE-2021-47392 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47392, 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:  RDMA/cma: Fix listener leak in rdma_cma_listen_o...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure  If cma_listen_on_all() fails it leaves the per-device ID still on the listen_list but the state is not set to RDMA_CM_ADDR_BOUND.  When the cmid is eventually destroyed cma_cancel_listens() is not called due to the wrong state, however the per-device IDs are still holding the refcount preventing the ID from being destroyed, thus deadlocking:   task:rping state:D stack:   0 pid:19605 ppid: 47036 flags:0x00000084  Call Trace:   __schedule\u002B0x29a/0x780   ? free_unref_page_commit\u002B0x9b/0x110   schedule\u002B0x3c/0xa0   schedule_timeout\u002B0x215/0x2b0   ? __flush_work\u002B0x19e/0x1e0   wait_for_completion\u002B0x8d/0xf0   _destroy_id\u002B0x144/0x210 [rdma_cm]   ucma_close_id\u002B0x2b/0x40 [rdma_ucm]   __destroy_id\u002B0x93/0x2c0 [rdma_ucm]   ? __xa_erase\u002B0x4a/0xa0   ucma_destroy_id\u002B0x9a/0x120 [rdma_ucm]   ucma_write\u002B0xb8/0x130 [rdma_ucm]   vfs_write\u002B0xb4/0x250   ksys_write\u002B0xb5/0xd0   ? syscall_trace_enter.isra.19\u002B0x123/0x190   do_syscall_64\u002B0x33/0x40   entry_SYSCALL_64_after_hwframe\u002B0x44/0xa9  Ensure that cma_listen_on_all() atomically unwinds its action under the lock during error.",
  "published": "2024-05-21T15:15:24Z",
  "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": 0.00239,
  "epssPercentile": 0.15026,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47392",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47392",
      "released": "2024-05-21T15:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47392",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47392",
      "released": "2024-05-21T15:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47392",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47392",
      "released": "2024-05-21T15:15:24Z"
    }
  ],
  "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"
  }
}