ghsa-v47h-hxgq-326f
Vulnerability from github
Published
2025-02-27 03:34
Modified
2025-11-03 21:33
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

NFSD: fix hang in nfsd4_shutdown_callback

If nfs4_client is in courtesy state then there is no point to send the callback. This causes nfsd4_shutdown_callback to hang since cl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP notifies NFSD that the connection was dropped.

This patch modifies nfsd4_run_cb_work to skip the RPC call if nfs4_client is in courtesy state.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21795"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T03:15:20Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix hang in nfsd4_shutdown_callback\n\nIf nfs4_client is in courtesy state then there is no point to send\nthe callback. This causes nfsd4_shutdown_callback to hang since\ncl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP\nnotifies NFSD that the connection was dropped.\n\nThis patch modifies nfsd4_run_cb_work to skip the RPC call if\nnfs4_client is in courtesy state.",
  "id": "GHSA-v47h-hxgq-326f",
  "modified": "2025-11-03T21:33:02Z",
  "published": "2025-02-27T03:34:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21795"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/036ac2778f7b28885814c6fbc07e156ad1624d03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23ad7797c74cd8f7f90617f1e59a8703e2b43908"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38d345f612503b850c2973e5a879f88e441b34d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abed68027ea3ab893ac85cc46a00e2e64a324239"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cedfbb92cf97a6bff3d25633001d9c44442ee854"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e88d2451cd42e025465d6b51fd716a47b0b3800d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efa8a261c575f816c7e79a87aeb3ef8a0bd6b221"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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